Question

Say true or false:

$-\frac{1}{3}$ is a zero of $3x+1.$

• A. True
• B. False

Answer 1

The correct option is A True

Let $f\left(x\right)=3x+1$.
We know, if $-\frac{1}{3}$ is zero of $f\left(x\right)$, then $f(-\frac{1}{3})$ must be $0$.
Thus,
$f(-\frac{1}{3})=(-3\times \frac{1}{3})+1$
$=(-\frac{3}{3})+1$
$=-1+1=0$.

Hence, the statement is true.

Therefore, option $A$ is correct.