Question

Let f(x) = 12 over 4x+3. Find f(-1)

Answer 1

$f(x)=\dfrac{12}{4x+3}$

Substitute x = -1 to the equation of the function:

$f(-1)=\dfrac{12}{4(-1)+3}=\dfrac{12}{-4+3}=\dfrac{12}{-1}=-12$

Answer: f(-1) = -12

Answer 2

Sub -1 into the x's
$f( - 1) = \frac{12}{4( - 1) + 3}$
simplify.
$= \frac{12}{ - 4 + 3}$

$= \frac{ - 12}{ - 1}$
awnser:

$f( - 1) = - 12$