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Given that .^(n)C(n-r)+3^(n)C(n-r+1)+3. ...

Given that `.^(n)C_(n-r)+3^(n)C_(n-r+1)+3`.
`.^(n)C_(n-r+2)+.^(n)C_(n-r+3)=.^(x)C_(r)`. Find x

A

n+1

B

n+2

C

n+3

D

n+4

Text Solution

Verified by Experts

The correct Answer is:
C
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