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the coefficient of x2 inthe expansion of (1+9x+27x^2+27x^3)^10

the coefficient of x2 inthe expansion of (1+9x+27x^2+27x^3)^10

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1 Answers

Badiuddin askIITians.ismu Expert
148 Points
12 years ago

Dear sri

(1+9x+27x2+27x3)10

 = (1+3x)30

so co efficient of x2 is = 30C2 32

                                        =930C2

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