Writing Summations in Sigma Notation

Learn how to write summations in sigma notation in this free math video tutorial by Mario's Math Tutoring. We go through some examples.
0:24 Difference Between a Sequence and a Series
0:33 Reviewing Sigma Notation
0:57 Example 1 3 + 5 + 7 + 9 +.....
1:08 Arithmetic Sequence Formula
1:50 Writing in Sigma Notation
3:00 Example 2 100 + 50 + 25 + ...
3:08 Using the Geometric Sequence Formula to Write in Sigma Notation
3:54 Example 3 (1/2) + (2/3) + (3/4) + ...+ (99/100)
Related Videos:
Learn All About Sequences & Series with My Playlist Here
• Sequences & Series
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[@Logomachy]

Teacher didn’t teach this, yet expected us to do it for homework. Thanks for teaching it !

[@thecatsmeow4478]

brooooooo fr tho

[@benaw3434]

Yes and being so annoying is killing me

[@Logomachy]

YOOO I GOT A 98% ON MY EXAM BECAUSE OF THIS

[@Countryballfan1987]

Congrats 🎊

[@jonothanlister1000]

I really appreciate your concise clear explanation. I link your videos for my students often for review. Students claim it really helps them. I can not thank you enough as a fellow math teacher.

[@MariosMathTutoring]

Thanks Jonothan! And thanks for sharing my content with your students! I’m glad to hear it is helping them!

[@ewsyt1718]

Yeah Today is mine examination and i found this video thanks a lot sir lots of love from nepal❤❤🇳🇵

[@yeezuschrist420]

My math teacher took half an hour to explain this on online school... you took 3 and a half minutes... thanks!

[@MariosMathTutoring]

You’re welcome!

[@benbalde60]

best math youtube channel on youtube

[@keshiaduplooy119]

Mario, I appreciate you deeply 💖💖

[@MariosMathTutoring]

Glad you liked the video!

[@abdullahhamidaddin2388]

Mr Mario, how about the last one ? I couldn't know if it's arithmetic or geometric

[@yvng_chldsupport3918]

Mario you are my math savior. Thank You!!!

[@justsomeguywithabeard7528]

Damn Johnny was a doctor, an astronaut, a technician, Now a Math Teacher????

[@iodinetogetherwithuranium2941]

I really needed the answer for the third one🙄

[@rahul7247]

Nice video
U deserve a like from me👍👍👍

[@MariosMathTutoring]

Glad you liked the video Rajana!

[@Akira-nd1wi]

I should've watch this before taking my test 😭😭

[@MariosMathTutoring]

Better late than never!

[@asfiyazainab2184]

the video doesnt show the last example, it cuts off

[@iodinetogetherwithuranium2941]

The last one answer:
( n/n+1)- formula of that series . i=1, n=99 on summation notation
(Is this correct🤔🙄)

[@findinglambsaucewithgordon8337]

Thank you.

[@adgf1x]

Sum =10*(2+59)=610.ans s=n(a+last term)/2

[@bruh_nut]

w vid man 👍

[@arnavsharma3880]

thank you

[@MariosMathTutoring]

You’re welcome Arnav!

[@ContentCreature24]

Thanks alot

[@MariosMathTutoring]

Your welcome!

[@ezedienseid9477]

It is good but in the second question why you take (i-1) as apower??

[@beaniebob7877]

thank you so much

[@MariosMathTutoring]

You’re welcome Naomi! Glad my video helped you!

[@adgf1x]

Sum=10*(2+59)=610

[@rayeonshiedits9698]

✊✊

[@adgf1x]

Sum=610