4 O Example 15: Coefficient of x* in the expansion of621 + 3x +2.Xis – InterviewSolution

1.	4 O Example 15: Coefficient of x* in the expansion of621 + 3x +2.Xis:(a) 240(c) 820(b) 735(d) 936
Answer» {B}Step-by-step EXPLANATION:( a1+3 + B2X 2 ) 6 USING binomial expansion6 C R (1+3x) 6−r (2x 2 ) r Power of x will be 11 only when r=56 C 5 ×3×2 5 =576

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