Let f(x)= cases 4, & x<-1 -4x, & -1 x 0. cases If f(x) is an even function in R then the definition of f(x) in (0,+ ) is

JEE Advanced Mathematics question

Let

f(x)=

If is an even function in then the definition of in is

Answer: (A)

For an even function, .

- If then , so . - If then , so

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Question ID VK-109161