Finding the formula for a sequence of terms

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  • Опубликовано: 14 янв 2025

Комментарии • 116

  • @Shiftheads1
    @Shiftheads1 6 лет назад +315

    He is the Jonny Sins of calculous

  • @jiis4kookonly811
    @jiis4kookonly811 5 лет назад +132

    If we only have a teacher like that in which we can ask freely if we have question😢

  • @mohamadelharakeh6441
    @mohamadelharakeh6441 4 года назад +41

    this will be my last video of this semester . thank you so much for all the work you put in your videos .. you were more helpful than the teacher i paid to be .. again thanks so much for every video you did.

    • @qalba3016
      @qalba3016 2 года назад +3

      No no no this is very wrong
      -1(1)*2+(-2)= 0 regardless of these theories it’s an accident because if you only change 1 number or add to one of them it’s NOT going to add up as explained

    • @adityamodi7995
      @adityamodi7995 9 месяцев назад

      @@qalba3016 try again and see dumb**. what he taught is accurate.

  • @charisegumapac3609
    @charisegumapac3609 3 года назад +14

    I really love your videos. All the lessons that I can't understand makes sense now after watvhing yours. Thank God I have someone to learn more from!Thanks Brian💗
    -from Philippines

  • @spooksmeister309
    @spooksmeister309 6 лет назад +15

    Thank you Mr. Logan! I have always looked to you for help since 2 years!

    • @brianmclogan
      @brianmclogan  6 лет назад +7

      well really appreciate your loyalty and the fact I have been able to help for so long

  • @alnajoyligsanan1581
    @alnajoyligsanan1581 4 года назад +11

    Thank you 😌😍💞❤️💗 and good bless

  • @ankitbhandari4130
    @ankitbhandari4130 5 лет назад +10

    Thank you for yrs valuable information sir .keep it up.

  • @renan6827
    @renan6827 5 лет назад +6

    Learning it right now. Thank you

  • @thisrandomdude_
    @thisrandomdude_ 2 года назад +3

    Woah. Mind blown. This was so interesting to learn! I'm sure it'll come in handy next year, when we deelve deeper into arithmetic series.

  • @yimengxuezhongwen
    @yimengxuezhongwen 2 года назад +1

    wow the patience you have with those questions I would lose it

  • @lolliz100
    @lolliz100 2 года назад +8

    That last question that student asked at the end was my concern as well.... Which is: Is there another way of figuring out the Formula other than trying arbitrary methods until it works. Lol.
    I was hoping that the general format of Arithmetic Progression or Geometric Progression would always easily manifest the formula, but after watching many videos, I've seen that what you all have in common is just trying different operations and mix of operations until it gives rise to the progressing terms. So I guess I can conclude that's the nature and approach of the topic Sequences & Series.
    But this was nicely reasoned out though, Thankyou.

  • @axldrewvarca5047
    @axldrewvarca5047 3 года назад +1

    Thank you 💕 for learning

  • @iyajaydeduenas8608
    @iyajaydeduenas8608 4 года назад +1

    Thanks you save my grades 😊

  • @yourfavlightskin2903
    @yourfavlightskin2903 3 года назад +1

    The love i have for this teacher I hope he is my algebra 2 teacher I bet he would be the smartest teacher in our school 😂

  • @Raghad_KS
    @Raghad_KS Год назад +1

    Thanks

  • @sarahmohammed5185
    @sarahmohammed5185 4 года назад +6

    He's a master

  • @princessmaybriz1367
    @princessmaybriz1367 4 года назад +2

    you helped me a lot, thanks!

  • @average_is-2749
    @average_is-2749 6 лет назад +28

    This man is a god

    • @javeedmuhammad4233
      @javeedmuhammad4233 4 года назад +3

      The fuck?

    • @wachowski9525
      @wachowski9525 4 года назад

      @@javeedmuhammad4233 Whenever someone says something so drastic it's almost scary lol, what's going on in that head y'know

  • @conordonovan1373
    @conordonovan1373 Год назад

    This dude is awesome, serious math teacher vibes too haha

  • @notsurewhattoputhereyet7052
    @notsurewhattoputhereyet7052 5 лет назад +68

    whoever kept interrupting him was really annoying.

    • @sarahmohammed5185
      @sarahmohammed5185 4 года назад +1

      I know right

    • @xLeroi
      @xLeroi 4 года назад +12

      Don't worry I stabbed her

    • @lollol-rn9kp
      @lollol-rn9kp 4 года назад +6

      @@xLeroi thank you for doing gods work 🥰

  • @ed6393
    @ed6393 4 года назад +1

    Really good inductive approach. Thank you for uploading

  • @shaneglass3576
    @shaneglass3576 5 лет назад +6

    Your students are mind-numbing

  • @jianez7141
    @jianez7141 4 года назад

    todos latam se lo agradece señor

  • @izzahzamri2267
    @izzahzamri2267 3 года назад

    FINALLY!!!!!NTHANKS A LOT SIR!!!!!

  • @giselindeanguwo6283
    @giselindeanguwo6283 Год назад

    Good teacher

  • @carlik3974
    @carlik3974 6 лет назад +11

    How do I find an when the sequence is increasing by a power? 18,20,24,32,48

  • @jeanroseromo4422
    @jeanroseromo4422 5 лет назад +3

    What if sir Everything is positive but the same term that u give?

  • @xyfinedaydreamer3130
    @xyfinedaydreamer3130 6 лет назад +2

    You enlightened my mind thank you much😊👍

  • @davidhashemiannik678
    @davidhashemiannik678 11 лет назад +2

    Thank You, helped me so much.

  • @yachoooo1748
    @yachoooo1748 4 года назад

    I lovvvvveee you you just save my day

  • @megsalex4017
    @megsalex4017 6 лет назад +5

    What about this problem... Gregor has decided to create a new sequence that starts with the numbers 4,1,5,6,11,... where each term after the first two terms is found by adding the two previous terms. On the 25th term, his addition was off by . That is, the sum was 1 greater than the correct one. If he made no other mistakes, how far off was the 35th term?
    Term 1 = 4Term 2 = 1Term 3 = Term 1 + Term 2 = 4 + 1 = 5Term 4 = Term 2 + Term 3 = 1 + 5 = 6Term 5 = Term 3 + Term 4 = 5 + 6 = 11
    Thank you so much if u can help I’m just so confused I don’t know at all what to do

    • @brianmclogan
      @brianmclogan  6 лет назад +2

      sorry just have time to focus on what I am currently teaching

    • @dinkmalone9065
      @dinkmalone9065 6 лет назад +2

      what are you currently teaching

  • @lucirius1773
    @lucirius1773 4 года назад

    Thank youuuuu you help alot..

  • @VijaySingh-bh8go
    @VijaySingh-bh8go 6 лет назад +2

    How do you find the quadratic sequence with only the 2nd term and 4th term to

    • @brianmclogan
      @brianmclogan  6 лет назад +1

      I believe I have a couple of videos on geometric sequences that will help just search my channel "geometric sequences"

  • @firozahmad6181
    @firozahmad6181 4 года назад

    Thank you!!

  • @ahmux4506
    @ahmux4506 4 года назад

    Thank you

  • @sultown4343
    @sultown4343 2 года назад +1

    Student who kept raising ideas would understand if she just listened for 2 minutes 💀

  • @professorthanos1138
    @professorthanos1138 6 лет назад +2

    How can I find the answer to 1, -4, 9, -16, 25? I kinda understand the video but how can i find the explicit formula to the question above?

    • @brianmclogan
      @brianmclogan  6 лет назад +1

      looks like you are dealing with square numbers n^2 and alternating signs (-10)^n

    • @professorthanos1138
      @professorthanos1138 6 лет назад

      Brian McLogan i have a math homework and the question is find a sub 8 in each of the following sequences and im really confused on how to find the answer

    • @brianmclogan
      @brianmclogan  6 лет назад

      not sure what sub 8 means

    • @remupantoja9302
      @remupantoja9302 6 лет назад

      maybe plug in 8 to it

  • @alrayhankamal7187
    @alrayhankamal7187 4 года назад +2

    Can someone tell me the meaning of the (-1)^n? Pls?

    • @ksitings763
      @ksitings763 4 года назад +1

      So basically if u do -1 to the power of any odd number, u will get -1. If u do it to the power of any even number, u will get 1. (-1)^n is only used for sequences that have both positive and negative numbers

  • @fufu3768
    @fufu3768 2 года назад

    Hi, quick question. Where did the "2+1" on the second term went?

    • @Dr.PayalHiranwar
      @Dr.PayalHiranwar Год назад +1

      2+1 =3 and (-1) to the power 3 will give "negative 1". Odd powers of (-1) will always give ( -1). And Even powers of (-1) will give value 1

  • @ashanticarter8537
    @ashanticarter8537 6 лет назад +1

    How do you do it by finding the 52nd term satrting with 4

    • @brianmclogan
      @brianmclogan  6 лет назад +1

      Depends on the type of sequence, here is my playlist for arithmetic and geometric ruclips.net/p/PL0G-Nd0V5ZMpQxNU0stxlxgHLxYY-Rq1b ruclips.net/p/PL0G-Nd0V5ZMpZTW9A9qe6JnfyyTwXOaY0

  • @jonreyobus8608
    @jonreyobus8608 4 года назад

    Thanks po

  • @keithannsosa6130
    @keithannsosa6130 2 года назад

    thankyouuu so muchhh

  • @atizadoeric8213
    @atizadoeric8213 4 года назад

    Its really help

  • @justblue9379
    @justblue9379 5 лет назад +2

    How did u find your n's though?

    • @TheQuancy
      @TheQuancy 5 лет назад +5

      Generally we always start with n=1
      so, n is usually 1,2,3,4,5,6.... etc
      n doesnt matter because whatever number u plug in, should result in the same pattern

  • @shenshen1161
    @shenshen1161 4 года назад +1

    what is its common difference?

  • @konnos06
    @konnos06 2 года назад

    Is there another way of representing instead of (-1) to the power of?

    • @brianmclogan
      @brianmclogan  2 года назад

      It must me negative for the alternating signes

  • @relentlessalwin8850
    @relentlessalwin8850 Год назад

    thankfull

  • @Dr.PayalHiranwar
    @Dr.PayalHiranwar Год назад

    I like your way of teaching. Mine is also the same. I like students asking me doubts in the class. It's only then that their concepts get cleared. I am from India 🇮🇳. You are doing great Job👌

  • @drewelliott3132
    @drewelliott3132 4 года назад +3

    there's always that one person in class that won't stfu lol

  • @subhojithalder2814
    @subhojithalder2814 Год назад

    Can it be (-1) ∆(n-1) (n∆2+1)
    Jst asking that (n+1) can be (n-1)?

  • @RandomTot
    @RandomTot 4 года назад +1

    Omg thank you

  • @amac2813
    @amac2813 5 лет назад +1

    I have a CFP and this is complicated

  • @1XXAylinXX
    @1XXAylinXX 11 месяцев назад

    purrrr my college professor could never and chatgpt gets those random errors ugh

  • @sensui4466
    @sensui4466 5 лет назад +5

    (n-1) - n(n+1) is another formula for this sequence

    • @arulgk9673
      @arulgk9673 5 лет назад +1

      rheaa Yeah that works too

    • @barrydavis331
      @barrydavis331 4 года назад +1

      No, it does not work.
      Input 1 gets output -2 (wrong) (1-1) -1(1+1) = 0 -1(2) = 0 - 2 = -2
      Input 2 gets output -5
      Input 3 gets output -10 (wrong)

  • @sartorio9129
    @sartorio9129 2 года назад

    thank sir Johnny Sin

  • @patrickmayer9218
    @patrickmayer9218 2 года назад

    Calc 2 goes brrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr!

  • @divergentmaths
    @divergentmaths 3 года назад +1

    2 - 5 + 10 - 17 + 26 - 37 ± … = 1/2

  • @rayhanrani3857
    @rayhanrani3857 2 года назад +1

    bro this class

  • @programmer9310
    @programmer9310 7 месяцев назад

    Please I need explain how to solve the sequance : O, t, t, f, f, s, s 😢

  • @Amer54405
    @Amer54405 Год назад +2

    You have a mistake in the bigining you should multiply by (-1)^(n+1)

  • @losanentombimaleka9787
    @losanentombimaleka9787 2 года назад

    Im struggling with -6;...; 3 ;...; 15

  • @VaibhavKumar-p9c
    @VaibhavKumar-p9c Год назад

    He looks like Randy Orton

  • @francisrafaelpuertas7145
    @francisrafaelpuertas7145 4 года назад

    There's magic

  • @iiiimaaaan
    @iiiimaaaan 3 года назад

    2, -5, 10, -17..... Is -20

  • @adgf1x
    @adgf1x 2 года назад

    Formula=2+(n-1)*-7=9-7n

  • @ghostfrom1950
    @ghostfrom1950 4 года назад

    So you're saying this is a bunch of trial and error? GREAT

  • @Chama0398
    @Chama0398 4 года назад

    Answer Is +26

  • @meowzxfjxf5412
    @meowzxfjxf5412 4 года назад

    Yasssss

  • @PSALMS413
    @PSALMS413 2 года назад

    i for sure have a learning disability

  • @melancholiac
    @melancholiac 3 года назад

    Personally, I think his explaining is crap. Kept losing me.

    • @brianmclogan
      @brianmclogan  3 года назад

      Happens, sorry about that, I have a lot of videos some good, and as you noted, some not so much

    • @melancholiac
      @melancholiac 3 года назад

      Mate, you win some, you lose some. Plenty of people enjoyed your lecture, I just didn't. Horses for courses.

  • @edmariotorio8271
    @edmariotorio8271 4 года назад

    Its wrong -1square is still -1

    • @sparguspargu7014
      @sparguspargu7014 4 года назад +1

      Negatives with exponents that are even numbers give you a positive.
      So -1^2 = 1

    • @adrianrainierfabian1852
      @adrianrainierfabian1852 4 года назад +2

      -1 x -1 =1

    • @simplydannie
      @simplydannie 4 года назад

      Edmario.. A if you mutliply a negative with another negative, it will be a positive.

  • @boccaluppo930
    @boccaluppo930 4 года назад

    This professor
    s attitude is condescending. ugh