Question

For all values of x
f(x) = 3x + 2
Find f-¹(-12)

Answer 1

-4.67

Explanation:

first find f^-1(x)

let f(x)=y

y=3x+2

3x=y-2

x=y-2/3

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

Now f^-1(-12)=-12-2/3

=-14/3

=-4.67