Question

If the fifth term in the expansion of  does not depend upon x, then  equals

Solution

Correct option is

240

For this to be independent of xn = 16.

SIMILAR QUESTIONS

Q1

  

                                                                           

Q3

If A and B are coefficients of xn in the expansions of (1 + x)2n and (1 +x)2n–1 respectively, then A/B is equal to

Q4

The coefficient of xk in the expansion of E = 1 + (1 + x) + (1 + x)2 +…+ (1 + x)n is

Q5

Coefficient of x7 in the expansion of (1 – 2x + x3)6 is

Q6

Coefficient of x8 in the expansion of (1 + 2x – x3)6 is

Q7

If the middle tern in the expansion of  is 40 then x equals

Q8

If the term independent of x in the expansion of  is 405, then kequals

Q9

In the third term in the expansion  is 2, then x equals

Q10

 the greatest term in absolute value in the expansion of (a +b)50 is