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OpenStudy (anonymous):
what is the inverse function of 7x+4 ( this is a one to one function) ??
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OpenStudy (anonymous):
it is one to one because the graph is a line
OpenStudy (anonymous):
suppose you had to solve \[7x+4=25\] what would you do? subtract 4 then divide by 7 that is what the inverse function does, find the input when you know the output, so it is \[f^{-1}(x)=\frac{x-4}{7}\]
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