Binomial (1 Viewer)

[Hello_World2]

Sorry for posting so many questions, but Binomial is my worst subject, and I really need help with the circled questions. Thanks for da help

 

[cossine]

View attachment 36674
Sorry for posting so many questions, but Binomial is my worst subject, and I really need help with the circled questions. Thanks for da help

For 10 it is proof by cases. Suppose you are choosing x 2 times. So you need x^2.

Do you understand the binomial theorem what is the importance of nCk.

If yesthen I think you need to give the question a go.

 

[Hello_World2]

For 10 it is proof by cases. Suppose you are choosing x 2 times. So you need x^2.

Do you understand the binomial theorem what is the importance of nCk.

If yesthen I think you need to give the question a go.

Ohh, you just need to compare coefficients of x^2, I got it thanks!