JEE Math Practice Question
The sum of the coefficient of $$x^{2 / 3}$$ and $$x^{-2 / 5}$$ in the binomial expansion of $$\left(x^{2 / 3}+\frac{1}{2} x^{-2 / 5}\right)^9$$ is
- A.19/4
- B.69/16
- C.63/16
- D.21/4
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