Скачать или смотреть If α and β be the coefficients of x^4 and x^2 respectively in the expansion of (x+√(x^2-1))^6+(x-...

If α and β be the coefficients of x^4 and x^2 respectively in the expansion of (x+√(x^2-1))^6+(x-√(x^2-1))^6, then
(1) α+β=60
(2) α+β=-30
(3) α-β=-132
(4) α-β=60

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