Question:
For natural numbers $\mathrm{m}, \mathrm{n}$ if $(1-y)^{m}(1+y)^{n}$ $=1+a_{1} y+a_{2} y^{2}+\ldots \ldots .$ and $a_{1}=a_{2}=10$, then $(m, n)$ is
Correct Option: 4
JEE Main Previous Year 2006
Solution:
For natural numbers $\mathrm{m}, \mathrm{n}$ if $(1-y)^{m}(1+y)^{n}$ $=1+a_{1} y+a_{2} y^{2}+\ldots \ldots .$ and $a_{1}=a_{2}=10$, then $(m, n)$ is
Correct Option: 4