If the coefficients of rth and (r+1)th t...

If the coefficients of rth and (r+1)th terms in the expansion of
`(3+7x)^(29)` are equal, then r equals

A

15

B

21

C

14

D

None of these

Verified by Experts

The correct Answer is:

B

Similar Questions

Explore conceptually related problems

If the coefficients of (r-5)th and (2r-1)th terms in the expansion of (1+x)^(34) are equal, find r.

If the coefficients of (r-5)^( th) and (2 r-1)^ (th) terms in the expansion of (1+x)^(34) are equal, find r .

Find the 4th term in the expansion of (x-2y)^12

What is the coefficient of the (r+1)^(th) term in the expansion of (1+x)^n ?

If the coefficients of x^(3) and x^(4) in the expansion of (3 + k x)^(9) are equal, then the value of k is

What is the coefficient of 5th, 6th and 7th terms in the expansion of (1+x)^n ?

Find the coefficient of the middle term in the expansion of (1+a)^7

The coefficient of the middle term in the expansion of (x+2y)^(6) is