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If in the expansion of (1 + x)^(20), the...

If in the expansion of `(1 + x)^(20)`, the coefficients of `r^(th)` and
`(r +4)^(th)` terms are equal, then the value of r,is

A

7

B

8

C

9

D

10

Text Solution

Verified by Experts

The correct Answer is:
(c )
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