The Coefficient Of x8 in The Expression Of 

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Question

The coefficient of x8 in the expression of 

Solution

Correct option is

 

E = sum of a G.P. of (n + 1) terms

Coefficient of x8 in E is coefficients of x9 in (1 + x)n+1 which is

Testing

SIMILAR QUESTIONS

Q1

The number of terms which are free from fractional powers in the expansion of (a1/5 + b2/3)45a ≠ b is

Q2

If n is an odd natural, then  equals

Q3
Q4

The coefficient of xm in (1 + x)r + (1 + x)r+1 + (1 + x)r+2 +….+ (1 + x)nr≤ m ≤ n is

Q5

 respect to x, is

Q6

 is a polynomial of degree 5, then n

Q7

If in the expression of (1 + x)m (1 – x)n. the coefficient of x and x2 are 3 and – 6 respectively, then m is

Q8

The number of terms in (1 + x)101 (1 + x2 – x)100 is

Q9

In the binomial expansion of (a – b)n, n ≤ 5, the sum of the 5th and 5thterms is zero. Then  equals

Q10

The coefficient of xn in the expansion of (1 + x) (1 – x)n is