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MathGH
Добавлен 14 дек 2014
Видео
Set Builder Notation
Просмотров 856 лет назад
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Practice with Truth Tables
Просмотров 466 лет назад
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Proofs with Truth Tables
Просмотров 816 лет назад
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Introduction to Mathematical Proofs
Просмотров 1876 лет назад
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Harder Practice with Permutations and Combinations
Просмотров 39 тыс.6 лет назад
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Proof by Contradiction
Просмотров 1446 лет назад
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Intro to Sets Revised
Просмотров 1266 лет назад
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Binomial Theorem
Просмотров 1 тыс.6 лет назад
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In the last question of the video, why wasn't the number of cards(shapes whatever) for each of the cards specified. Like why wasn't it written that there are 13 diamonds in the set etc.
I like to think of the 1st question differently. From my what I learned about circular permutation, we can think of it as linear arrangement but we've overcounted by the possible rotations. We can rotate the table in such possible arrangement, and it happens 'n times for n seats'. I'd like check my understanding here, I'll be glad if anyone could help... So what I did was (for the 1st question)-- First I considered linear arrangements, I came up with 2 possible cases - MenWomenMean...+ WomenMenWomen... And divided by 8 (8 seats) And got the same answer I just wanted to check if theres something wrong with my logic
How do you account for cases where the two supposed cases just happen to be the same? MWMW could be interpreted as WMWM based on the starting point
helps so much thank you
Well explained however it would have been to explain a more complexed function with transformations and such.
this was so helpful, thank you !
Second problem is not right, we can prove it easily by stating the problem as: A bookshelf has 5 fiction books and 6 non-fictioon books. In how many ways can we choose two books of each type? the answer is not 150. the equation for the original question is simply 6x=150
The answer in the vedio is correct. There are 5 non fiction books. That equation you're talking about is wrong, because what is x supposed to represent
stupid teacher
wu
what a g, thanks for doing the things my math teacher can’t🙏🏼
this is amazing Thank you very much
Never thought of using song to memorize mundane information like that. So amazing, you're an amazing teacher!
In the first example where did you get 10 from
10 is the number of digits in your passcode
Ah, thank you sooo much!! 💜💜💜
thanks
Thanks
Can direction be a negative
THANKS!! This help so much. I was so confused when I should add 180
❤
Thanks! Helped a lot
I solved the 2 question using quadraticn formula I got 1+-root 79/2
Hello, why if it is not divisible by 3, we got the cases of 3m+1 & 3m+2
First. Every multiple of 3 can be represented by 3m (3 times any number) . Therefore any number that is not a multiple of 3 can be represented by THAT number (3m) plus 1 or 2….. ie 3m +1, or 3m +2. This is b\c every number that is divisible by 3 is 3 digits away from every number divisible by 3. (3,6,9,12…. Etc). You have to represent the numbers in between numbers that are divisible by 3 which can only be 1 or 2 away.
@@stacksepc What about 3m-1, is that a non multiple
ya it is but that would already be accounted from the previous 3k with a plus 2@@abrilthom895
@@stacksepc you saved a life,thank you
@@FelaKayi good luck kid
How 9+4=5?
Thank you 🇵🇭
So underrated! Thank you‼️
7/-5 sir
had to see this video and reach this point of my life to know that I don't have to remember by heart how to simplify a squared binomial, but just distribute. 6:30 Thanks
Thank you! You saved me hours!
Buddy. This helped SO much. My flippin textbook has NO mention on how to solve for direction angle. I've been at a single problem for 4 hours, evidently because I wasn't clever enough to notice/remember that I could find the angle I need using basic Trig functions. Thanks for this!
Interesting problems but poor formulations and explanations.
thank u for helping me!
is it 7/5 or 7/-5?
He literally confused me lol
7/-5 bc it's in the 2nd quadrant
this explanation is better then other ones, really good helped me out, just maybe a third example on quadrant 3
Thank you!
Thank you! :)
Great video. Thanks so much.
thanks
lifesaver
I'm still a little confused as to why you don't divide by 8 on the first one. Wouldn't it be a different arrangement if each individual shifted over by one?
Yeah that's what I wanted to ask
Think it this way. What if the table wasn't a circular one but a straight one? In that case, the number of possible arrangement would be 2*4!*4!*. The 2 accounts for the fact that you could start the arrangement either with a man or a woman. So 2 ways. Now when you think of a circular table, you have to consider Rotational Symmetry( That's the key term). For 8 people we have 8 rotational symmetry,right? So you actually divide up everything by 8. You have 144.
i had no idea what the transverse axis was, tysm
Thx man buyed me a short time
Great piece!!!. It would had been better if your questions are made legible by increasing the size of your character.
You call this hard practice??? What's easy then??
I didnt understand the first one
Or third
Yo u the g
May i ask what category does number 1 belongs to?? Is it a permutation or a combination?
permutation
permutation as the order matters (men and female needs to be alternate to each other)!
Wow thank you very much
Hi sir or anyone can you tell me the answer for this question. A coach has 16 players and can pick from 11 players for a match. it consist of 7 specialist batsmen, 4 fast bowlers, 3 spinner and 2 wicketkeeper. how many different teams can be formed if it must comprised of 6 specialist batsmen, 3 fast bowlers , 1 spinner and a wicketkeeper.
7C6 (batsmen) x 4C3 (bowlers) x 3C1 (spinners) x 2C1 (wicketkeepers) = 168
More accurate question: A coach need 11 players and can pick from 16 players for a match.
@@HHH21 16C11
@@HHH21 No, that's wrong. The correct one is the answer by @Oli Wood, because if you choose 11 players from 16, then this also has the possibility to pick all 7 specialist batsmen and all 4 fast bowlers and one of the others.
@@mynameisjeff9124 How can you pick from only 11 players if total are 16? And there isn't any possibility to pick all 7 batsman and more because restrictions are already given
It help me thanks
thank you this helped alot
Great one!
We divided 4 for men because thats the society wants . Femenism Bruhhhh