What is coeﬃcient of x31y4 in the expansion of ((x + y)8 + y)7 ??? please help...

Question

Question

What is coeﬃcient of x³¹y⁴ in the expansion of ((x + y)⁸ + y)⁷???

please help with discrete math HW. please write clearly and dont make up an answer.............i will rate for the best answer thank you.

math Advanced-Math

Answer 1

Answer #1

Ans 31 xブ inthe epm sion (a we Know that BinemiExongiun h-r So 8xS 8x6 @*7 - t 4 gx2 C4 Now each thar oflicen 31 we toke S 6

Answer 2

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