document.write( "Question 128852: Can I have some help finding the inverse function of f.
\n" ); document.write( "f(x) = -4 + x \n" ); document.write( "

Algebra.Com's Answer #94258 by ilana(307) $\"\"$ $\"About$

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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.
\n" ); document.write( "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. \n" ); document.write( "

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