engineering recuitment BEL Probationary Engineers Mock Test 2025 Mathematics Differential Calculus Applications of Derivatives

Find the absolute maxima of f(x) = 5x3 + x2 - x + 1 on [-1, 2]?

1
at x = 2
2
at x = 1/5
3
at x = -1
4
at x = 1/3
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