Question

How do you find $f(a)$ given $f(x)=3x-5$?

Answer 1

Hint: The given is the function of x and it returns the value in terms of x. We have to find the value of $f(a)$ so we will substitute the value $x=a$ in the given equation and simplify it to get the desired answer.

Complete step by step solution:
We have been given that $f(x)=3x-5$.
We have to find the value of $f(a)$.
Here we have given the function $f(x)=3x-5$ and we have to find the value of $f(a)$. In this type of question we need to substitute the value asked in the question in the given equation. From the given function we observe that by replacing the x in the given equation by a we will get the required answer.
Now, substituting the value $x=a$ in the given equation and simplifying the obtained equation we will get
$\Rightarrow f(a)=3a-5$
Hence we get the value of $f(a)$ as $3a-5$, which is the required answer.

Note:
If we have to find any value for the particular value of x then we just have to replace x from the value in the given equation. In this particular question we don’t have any number or value to find the value if instead of a we have any number then by substituting the value and simplifying the expression we find the answer easily.