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OpenStudy (anonymous):
Let f(x) = 7x - 13. Find f-1(x).
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OpenStudy (mertsj):
y=7x-13 Switch the x and the y and solve for y
OpenStudy (hoblos):
y=7x -13 switch x and y x=7y-13 y= (x+13)/7 f^-1(x)=(x+13)/7
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