Question 128852: Can I have some help finding the inverse function of f.
f(x) = -4 + x
Found 2 solutions by ilana, jim_thompson5910:
Answer by ilana(307)   (Show Source):
You can put this solution on YOUR website! Sure, in the inverse function of f, every x becomes a y and every y becomes an x. So, for instance, f(1)=-4+1, so f(1)=-3. That means that f^-1(-3)=1, where f^-1 is the inverse function. Here is how to find that function.
Change f(x)=-4+x to y=-4+x. Then switch x and y, so it's x=-4+y. Now solve for y, so it's y=x+4. Change y to f^-1(x), and the inverse function is f^-1(x)=x+4. You can try that example I gave to check: f^-1(-3)=(-3)+4, so f^-1(-3)=1, just like it should.
Answer by jim_thompson5910(35256) (Show Source):
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