In the expansion of (1+3x+2x2)6 the coefficient of x11 is
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https://www.meritnation.com/ask-answer/question/in-the-binomial-expansion-of-2x2-x-3-6-find-the-coefficie/binomial-theorem/8623177
Refer the following similar link:
https://www.meritnation.com/ask-answer/question/in-the-binomial-expansion-of-2x2-x-3-6-find-the-coefficie/binomial-theorem/8623177