Teaching DSSSB PGT Mock Test 2025 Mathematics Differential Calculus Applications of Derivatives

If the Rolle's theorem holds for the function f(x) = x4 + ax3 + bx, in - 1 ≤ x ≤ 1, and f'\(\Big(\frac{1}{2}\Big) =0\) then ab =

1
-4
2
-64
3
-1
4
-8
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