Q61. - Algebra 2

Question

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

$\mathbf{f}\left(-\mathbf{1}\right)$

Step-by-Step Solution

Answer

The required solution is $f\left(-1\right)=-7$.

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 $f\left(-1\right)$.

Step 3 – Compute the required value

Put $x=-1$ in $f\left(x\right)=3x-4$ to get,

$\begin{array}{c}f\left(-1\right)=3\left(-1\right)-4\\ =-3-4\\ =-7\end{array}$

So, $f\left(-1\right)=-7$.

This is the required solution.