The term independent of x in the expansion of `(1+x+2x^2)(3/2^2- 1/(3x))^9` is (A) `7/18` (B) `2/27` (C) `7/18+2/27` (D) `(7/18)-(2/27)`

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The term independent of x in the expansion of (1+x+2x^2)(3/2x^2- 1/(3x))^9 is (A) 7/18 (B) 2/27 (C) 7/18+2/27 (D) (7/18)-(2/27)

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