If https://dlap.gradpoint.com/Resz/~0.H5Nd26u4FRMyUA6.1KhFdZPyJ_eB50_PyWuvUEA46ue4_B2wc9knAegCDUw/7234256,D47/Assets/questions/test/algebra_2/alg2inve/mc029-1.jpg, what is the equation for f–1(x)?
@mhchen
I am unable to open that link. But it looks like you're trying to find the inverse of an equation. Basically if this is your equation: f(x) = ax + b Switch f(x) and x: x = a*f(x) + b and solve for f(x) in your new equation
f(x)=1/4 x +3
Is that the equation from the question? I can't open the link just so you know.
yes
okay yeah so do this: x = 1/4 f(x) + 3 and solve for f(x) can you do that?
how do you solve for f(x)?
okay so you have \[x = \frac{1}{4}f(x) + 3\] right? First get 3 to the left side \[x - 3 = \frac{1}{4}f(x)\]
and then multiply by 4 to get f(x) by itself on the right side \[4(x-3) = f(x)\]
So 4(x-3) is the inverse, or f^-1(x)
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