JEE Mains Model Paper 3

Question : 14 of 90

Marks: +1, -0

Let f(x) =

∫

[(a - 1) (t2+t+1)2 - (a + 1) (t4+t2 + 1)] st then the value of 'a' for which f'(x) = 0 has two distinct real roots are

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