If Is equal to | Binomial Theorem | JEE MAIN 2026

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JEE MAIN 2026

06-04-2026 S2

Question

If $\left(1-x^3\right)^{10}=\sum_{\mathrm{r}=0}^{10} \mathrm{a}_{\mathrm{r}} x^{\mathrm{r}}(1-x)^{30-2 \mathrm{r}}$, then $\frac{9 \mathrm{a}_9}{\mathrm{a}_{10}}$ is equal to $\_\_\_\_$ .

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