Test Academy | The interval in which the function y = x³ + 5x² – 1 is decreasing, is (0, 1/3), (0, 10), (−10/3, 0), None of these

Question

The interval in which the function y = x³ + 5x² – 1 is decreasing, is

Options :

(0, 1/3)
(0, 10)
(−10/3, 0)
None of these

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