F(x)=5x-7. Find f^-1(-2)

Question

asked Apr 1, 2024 195k views

2 Answers

Mike Metzger · Answer 1 · 2024-04-04T21:12:56+0000

An inverse function must first be rearranged.
Essentially solving for y now instead of x

f(x)=5x-7 —> y=5x-7
f(y)=(y+7)/5 —> x=(y+7)/5
f(-2)=(-2+7)5 —> f(-2)=5/5

Answer:
f(-2)=1

F(x)=5x-7. Find f^-1(-2)

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