If $lpha$ and $eta$ be the coefficients of
Question:
If $\alpha$ and $\beta$ be the coefficients of $x^{4}$ and $x^{2}$ respectively in the expansion of
$\left(x+\sqrt{x^{2}-1}\right)^{6}+\left(x-\sqrt{x^{2}-1}\right)^{6}$, then:
Correct Option: , 4
Solution:
Using Binomial expansion