Q62. - Algebra 2

Question

Find each value if $\mathbf{f}\left(\mathbf{x}\right)=\mathbf{3}\mathbf{x}-\mathbf{4}$

$\mathbf{f}\left(\mathbf{3}\right)$

Step-by-Step Solution

Answer

The required solution is $f\left(3\right)=5$.

Step 1 – State the concept

The value of $f\left(a\right)$ is given by putting $x=a$ in the expression for $f\left(x\right)$.

Step 2 – List the given data

The given function is $f\left(x\right)=3x-4$ and the objective is to find $f\left(3\right)$.

Step 3 – Compute the required value

Put $x=3$ in $f\left(x\right)=3x-4$ to get,

$\begin{array}{c}f\left(3\right)=3\left(3\right)-4\\ =9-4\\ =5\end{array}$

So, $f\left(3\right)=5$.

This is the required solution.