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

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

 

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