Function f(x) = ax is increasing or R, ifA. a > 0B. a < 0C. a > 1D. a – InterviewSolution

1.

Function f(x) = ax is increasing or R, ifA. a > 0B. a < 0C. a > 1D. a > 0

Answer»

Correct answer is C.

Let x₁ < x₂ and both are real number

a^x₁ < a^x₂

\(\Rightarrow\) f(x₁) < f(x₂)

\(\Rightarrow\) x₁ < x₂ ∈

only possible on a > 1

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