Question

 

 then n must be equal to

Solution

Correct option is

21, 22

For R.H.S. to be a polynomial of degree 10, the last term of R.H.S. must

Thus can happen if n = 21 or 22

SIMILAR QUESTIONS

Q1

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

Q2

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

Q3

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

Q4

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

Q5

Coefficient of the term independent of x in the ex pansion of  is

Q6

Value (s) of x for which the fourth term in the ex pansion of  is 40 is (are)

Q8

If x2r occurs in  then n – 2r must be of the form

Q9

If the coefficient of rth, (r + 1)th and (r  + 2)th terms are in A.P., then n is a root of the equation

Q10

If in the expansion of (21/3 + 3–1/3)n, the ratio of the 7th term from the beginning to the 7th terms from the end is 1: 6, then n is equal to