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Which of the following functions is one-...

Which of the following functions is one-one?

A

`f:R rarr R` defined as f(x) `f(x) =e^(sgnx)+e^(x^2)`

B

`f: [-1,oo) rarr (0,oo)` defined by `f(x)=e^((x^2)+|x|)`

C

` f:[3,4]rarr [4, 6]` defined by `f(x) = |x – 11| + |x – 2|+Ix-3|+ lx-4|`

D

`f(x) = sqrt(ln(cos (sin(x))))`

Text Solution

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The correct Answer is:
C
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