Question:
Mark (√) against the correct answer in the following:
Let $f(x)=x^{3}$. Then, dom (f) and range (f) are respectively
A. R and R
B. $R^{+}$and $R^{+}$
C. $R$ and $R^{+}$
D. $R^{+}$and $R$
Solution:
According to sketched graph of $x^{3}$
Domain of $f(x)=R$
And Range of $f(x)=R$
Since $x^{3}$ is $a$, monotonically increasing function
