Answer:
inverse of f(x)= x+4 is
[tex]f - 1(x) = x - 4[/tex]
f-1(4)= 0
Step-by-step explanation:
replace f-1(x) by y:
[tex]y = x + 4[/tex]
then, rearrange the equation to make x the subject.
[tex]x = y - 4[/tex]
now change the y to x, and the x at the beginning to f-1(x). you get:
[tex]f - 1(x) = x - 4[/tex]
which is the answer.
for the second part, simply replace the x in equation that we got above to get:
[tex]f - 1(x) = 4 - 4[/tex]
so, f-1(4) = 0
