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OpenStudy (anonymous):
If f(x) = 7x – 12, what is f–1(x) ?
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OpenStudy (bahrom7893):
y = 7x - 12
OpenStudy (bahrom7893):
solve for y: y + 12 = 7x x = (y+12)/7
OpenStudy (bahrom7893):
so now just swap x and y: y = (x+12)/7
OpenStudy (bahrom7893):
so f-1(x) = (x+12)/7
OpenStudy (anonymous):
F(x)=7x-12 Y=7x-12 X+12=7y x+12/7=y y+12/7=x=f-1(x)
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