The coefficient of the term independent of x in the expansion of (1+x+2x^3 ) ( 32x^2- 1 3x )^9 is

JEE Main Mathematics question

The coefficient of the term independent of in the expansion of is

Answer: (C)

The general term of the second factor is ; the exponent takes the values for and never equals . From the factor : gives

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Question ID VK-021045