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21 April, 11:14
If f (x) = - 8x+4, then f^-1 (x) = ?
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Lia Carter
21 April, 13:11
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f (x) = - 8x+4 to find the inverse replace f (x) with y and solve for x
y = - 8x + 4
y-4=-8x
x = - (y-4) / 8
So you replace now x with f^-1 (x) and y with x to get the answer:
f^-1 (x) = - (x-4) / 8
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