UPSC NDA II 2010 Mathematics Paper

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Question : 51 of 120

Marks: +1, -0

For a point of inflection of y=f(x), which one of the following is correct?

‌
dy
dx
must be zero
‌
d2y
dx2
must be zero
‌
dy
dx
must be non-zero
‌
d2y
dx2
must be non-zero

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