Відео

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Great video to get 4 views🔥 if you search exactly the last 3 words before smile

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Really helped alot ❤ ty

Thank u ❤

How did u find 495

this is so helpful. thank you!

I`ve spent the last 3 days on not understanding the topic. summation exercise just jumped from basic to negative extremely quickly and no one explains what to do when r is negative. literally the only video on the entire youtube (and books) that explained me this topic. THANK YOU

So very impressed

much easier...I appreciate

Thank you so much. This helped me alot for my test. plzz post more on add maths

bro is enforcing the stereotypes

Very well explained.Thank you

Nice one

thank you

Amazing video serie, thanks man !

It can be factorised

Kinguu

This guy is a legend

youre explain was perfect thankyou so much may god bless you

It's really confusing the way it's written when he drops the 2 from the 2x in the denominator. Another way to look at it is you have x^18-2r * (1/2x)^r. you will divide out the (1^r/2) and multiply the x^18-2r into the numerator (leaving the x^r in the denominator). so the general term of the equation would look like 9Cr(1^r/2)(x^18-2r/x^r). The exponent principal x^a/x^b=x^a-b is applied x^18-2r-r=x^18-3r. Finally the general term of the formula is 9Cr(1^r/2)(x^18-3r) since we are trying to find the term containing x^3, we take the isolated x term and set them equal to each other, and because they are like base, we can drop the base and solve for r. X^3=X^18-3r, 3=18-3r, 15=3r, 5=r. I hope that helps some of you out. Maybe I should make a youtube video clarifying this youtube video 😂 I'm still just learning this myself.

binging all the way here from 1, this is so helpful, thank you

it's 2023 and this still helped

Wouldn't the answer for b = +/- 2 because the root is even?

It was very helpful

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Thank you very much ❤

Thanks. It helps a lot. What if r is 0, what happened to the numerator? How do you count zero on the numerator?

hi, your video was very clear and helped me a lot but i was confused on why -2/x becomes x^-1? could anyone explain it to me please thank you

Sir shouldn't the answer be 10?

Wow thanks