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Write the expression \ ^n C(r+1)+\ ^n C(...

Write the expression `\ ^n C_(r+1)+\ ^n C_(r-1)+2xx\ ^n C_r` in the simplest form.

A

`""^(n+2)C_(r)`

B

`""^(n+2)C_(r+1)`

C

`""^(n+1)C_(r)`

D

`""^(n+1)C_(r+1)`

Text Solution

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The correct Answer is:
B
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