1.

Find the coefficient of x^(7) in ((2+3x)^(3))/((1-3x)^(4)).

Answer»


ANSWER :`8 (""^10C_3 . 3^7) + 36 (""^9C_3 . 3^6)+ 54(""^8C_3 . 3^5) + 27 (""^7C_3 . 3^4)`


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