The coefficient of x6 in the expansion of frac 4 x5frac 52 x: (Mathematics) Question | DivineJEE | DivineJEE

Mathematics

The coefficient of

x^{-6}

, in the
expansion of

\left(\frac{4 x}{5}+\frac{5}{2 x^{2}}\right)^{9}

, is

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