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JEE Mains Model Paper 14

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Question : 67

Total: 90

Let f(x) = x3+ax2 + bx + 5sin2x be an increasing function in the set of real number R. Then

a2 - 3b - 15 > 0
a2 - 3b + 15 > 0
a2 - 3b - 15 < 0
a > 0 and b > 0

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