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Rojas
Mathematics
11 July, 13:10
If f (x) = 5x-1, then f^-1 (x) =
+5
Answers (
1
)
Kaylynn Salinas
11 July, 13:25
0
f^-1 (x) = (x+1) / 5
Step-by-step explanation:
f (x) = 5x-1
y = 5x-1
Exchange x and y
x = 5y-1
Solve for y
Add 1 to each side
x+1 = 5y-1+1
x+1 = 5y
Divide by 5
(x+1) / 5 = 5y/5
(x+1) / 5 = y
The inverse is (x+1) / 5
f^-1 (x) = (x+1) / 5
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