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UPSC NDA I 2018 Mathematics Solved Paper

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Question : 97

Total: 120

If 𝑓(𝑥) is an even function, where 𝑓(𝑥)≠0, then which one of the following is correct?

f′(x) is even function
f′(x)is odd function
f′(x) may be an even or odd function depending on the type of function
f′(x)is a constant function

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