If y = a x + bx^2 + x has its extreme value at x = -1 and x = 2, then the value of a + b is

MHT CET 2024 Mathematics question

If has its extreme value at and , then the value of is

Answer: (A)

At an extreme value . At : , i.e. . At : , i.e. . Substituting, , so and ; then

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Question ID VK-092972