F (x) = 12x+1

Find f (4)

f (4) is 49

Explanation:

Given:

f (x) = 12x + 1

f (4) = ?

we have to substitute the value of x = 4 in the given equation.

f (4) = 12 X 4 + 1

f (4) = 49

Whenever there is such type of question then we have to just put the value of x in the equation. In case of f ' (4) then we have to differentiate the given equation with respect to x first and then substitute the value of x in the differentiated equation.

Therefore, f (4) is 49