Q5 of 99 Page 59

Mark (√) against the correct answer in the following:

f : R + → R + : f(x) = ex is


f(x) = ex


Since the function f(x) is monotonically increasing from the domain R + → R +


∴f(x) is one –one


Range of f(x) = (1,∞) = R + (codomain)


∴f(x) is onto


∴ f : R + → R + : f(x) = ex is one - one onto.

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