What is the coefficient of the x9y-term in the binomial expansion of (2y + 4x3)4? 4 32 128 512

- 512

Explanation:-

We know that in the binomial expansion is given by

Assume that occurs in the term of the expansion of

Comparing power of x and y in    we get m=1

Thus term for m=1

Thus the coefficient of is 512.

correct answer:

b.(19,-2)

the answer is 21%.