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Term Free From x

Find the term independent of x in the expansion of a given binomial

Problem
Find the term that is independent of x in the expansion of $\left( 2 + \dfrac{3}{x^2} \right)\left( x - \dfrac{2}{x} \right)^6$.

A.   180 C.   -140
B.   160 D.   -160

 

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