Question

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

Solution

Correct option is

9

                 

SIMILAR QUESTIONS

Q1

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

Q2

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

Q3

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

Q4

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

Q5

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

Q7

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

Q8

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

Q9

 

 then n must be equal to

Q10

If sum of the coefficients of x7 and x4 in the expansion of