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If (1+2x+x^2)^n=sum(r=0)^(2n)ar x^r ,t h...

If `(1+2x+x^2)^n=sum_(r=0)^(2n)a_r x^r ,t h e na=` `(^n C_2)^2` b. `^n C_rdot^n C_(r+1)` c. `^2n C_r` d. `^2n C_(r+1)`

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
c
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ML KHANNA-BINOMIAL THEOREM AND MATHEMATICAL INDUCTION -Self Assessment Test
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