Question

If in the expansion of (a – 2b)n. the sum of 4th and 5th term is 0, then value of  is

Solution

Correct option is

             

SIMILAR QUESTIONS

Q1
Q3

Sum of the last 30 coefficients in the expansion of (1 + x)59 when expanded in ascending powers of x is

Q4

 then k is equal to:

Q5

 is maximum when m is

Q6

If ω ≠ 1 is a cube root of unity and (ω + x)n = 1 + 12ω + 69ω +…. Then values of n and x are respectively.

Q7

If ω ≠ 1, is nth root of unity, and  then value of x is

Q8

The remainder when  (24 times 5) is divided by 24 is

Q9

 divided by 7 is

Q10

The coefficient of t50 in (1 + t2)25 (1 + t25) (1 + t40) (1 + t45(1 + t47)……(1) is