JEE Advanced 2020 Concept Recapitulation Test 3 Paper 2

Question : 40 of 54

Marks: +1, -0

Let f(x)=

∫

[(a−1)(t2+t+1)2−(a+1)(t4+t2+1)] dt. Then the value of ' a ' for which f′(x)=0 has two distinct real roots are

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