luis837 luis837

15-11-2018
Mathematics

contestada

Inverse of f(x)=-5x+15

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davidhatejason davidhatejason

15-11-2018

f(x) = -5x - 15

Let y = f(x)

y = -5x - 15

Switch the x and y places, and solve for y:

x = -5y - 15

-5y = x + 15

y = (x + 15)/-5

y = -(x/5) - 3

So the inverse of : f(x) = -5x - 15 is

-x/5 - 3

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