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If the coefficient of a^(m) and a^(n) in...

If the coefficient of `a^(m)` and `a^(n)` in the expansion of `( 1+ a)^(m+n)` are `alpha` and `beta` than which one of the following is correct ?

A

`alpha = 2 beta`

B

`alpha = beta`

C

`2 alpha = beta`

D

`alpha = ( m +n) ^(beta)`

Text Solution

Verified by Experts

The correct Answer is:
B
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