Find a positive value of `m` for which the coefficient of `x^2` in the expansion f `(1+x)^m` is 6.

Explanation

General term of expansion `(a+b)^{n}` is `T_{r+1}=\ ^{n} C_{r} a^{n-r} b^{r}`


General term of expansion `(1+x)^m` is


`T_{r+1}=\ ^m C_{r} 1^{m-r} x^{r}=\ ^m C_{I} x^{r}`


Thus, `T_{r+1}=\ ^{m} C_{{r}} {x}^{r}`


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