Question

Assume f(x)-**? Find f-1(4).1021/211I don’t think my answer is right please help me

Answer 1

we have the function

$f(x)=\frac{x+2}{3}$

step 1

Find the inverse

Let

y=f(x)

so

y=(x+2)/3

step 2

Exchange the variables

x for y and y for x

x=(y+2)/3

step 3

Isolate the variable y

3x=y+2

y=3x-2

the inverse function is

f^-1(x)=3x-2

therefore

f^-1(4)=3(4)-2

f^-1(4)=10