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14 October, 14:34
Find the inverse of the function. f (x) = 7x - 1
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Alia Pratt
14 October, 16:29
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To find the inverse swap the x and y values ...
f (x) = 7x - 1
Start by replacing f (x) by ... y
y = 7x - 1
Now swap both x and y values ...
x = 7y - 1
Solve for x ...
x = 7y - 1
+1 + 1
x + 1 = 7 y
Divide both sides by 7
x / 7 + 1/7 = y
Now that we have our inverse you using the f (x) inverse notation ...
which is ... f (x) ^-1
So the inverse of this function is ... f (x) ^-1 = x/7 + 1/7
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