Question

Help me answer this.

Answer 1

iven:

here are givren the expression:

`(2z-y)^(20)`

xplanation:

o find the coefficient of the given expression, we need to use the binomial expansion formula:

So,

From the formula of binomial expansion:

`(x+y)^n=\sum_{k\mathop{=}0}^n(n,k)x^ky^(n-k)`

then,

After using the above formula in the given binomial, the expansion will be:

`(2z-y)^(20)=y^(20)-40y^(19)z+760y^(18)z^2-9120y^(17)z^3+77520y^(16)z^4-496128y^(15)z^5+...`

inal answer:

ence , the coefficient of the given term is shown below:

`77520`