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If the coefficients of r^("th"),(r+1)^("...

If the coefficients of `r^("th"),(r+1)^("th")and(r+2)^("th")` terms in the expansion of `(1+x)^(14)` are in A.P ., then r is /are -

A

5

B

12

C

10

D

9

Text Solution

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The correct Answer is:
A, D
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