Question

Function $f\left(x\right)=\log x$ is monotonic increasing when-

• A. $x\in R$
• B. $x\in R^{+}$
• C. $x\in R^{-}$
• D. $x\in R_0$

Answer 1

The correct option is B $x\in R^{+}$

The input of logarithmic function cannot be negative, and it is a strictly increasing function for
all $x>0$.
Hence answer is Option B.