JEE Math Practice Question
If $$\alpha $$ and $$\beta $$ be the coefficients of x4 and x2 respectively in the expansion of $${\left( {x + \sqrt {{x^2} - 1} } \right)^6} + {\left( {x - \sqrt {{x^2} - 1} } \right)^6}$$, then
- A.$$\alpha + \beta = 60$$
- B.$$\alpha - \beta = 60$$
- C.$$\alpha + \beta = -30$$
- D.$$\alpha - \beta = -132$$
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