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UPSC NDA I 2015 Mathematics Paper

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Question Numbers: 80-81

For the next two (2) items that follow:

Consider the function

f(x) = 0.75x^{4} - x^{3} - 9x^{2} + 7

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Question : 81 of 120

Marks: +1, -0

consider the following statements:

1. The function attains local minima at x = -2 and x = 3.

2. The function increases in the interval (-2, 0).

Which of the above statements is/are correct?

1 only
2 only
Both 1 and 2
Neither 1 nor 2

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