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The coefficient of x^(3l+2) in the expre...

The coefficient of `x^(3l+2)` in the expression `(a+x)^l(b+x)^(l+1)(c+x)^(l+2)` is

A

l(a+b+c)

B

l(a+b+c)+b+2c

C

l(a+b+c)+a+2b+3c

D

None of these

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The correct Answer is:
B
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PATHFINDER-BINOMIAL THEOREM-QUESTION BANK
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