Let (1 + x + x^2 + x^3 + x^4)^ 10 = a_0 + a_1x + a_2x^2 + + a_ 40 x^ 40 . Then

JEE Advanced Mathematics question

Let . Then

(A)
(B)
(C)Correct
(D)Correct

Answer: (C),(D)

Solution

Think of choosing one term from each of the 10 factors. - : choose from one factor and from the rest: . - : either from one factor (10 ways) or from two factors (C_2$ =

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Question ID VK-110397