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Terrence French
Mathematics
26 January, 18:28
If f (x) = - 15x-5, then f^-1 (x) =
+3
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1
)
Marlon
26 January, 18:43
0
(x+5) / -15 = f^-1 (x)
Step-by-step explanation:
f (x) = - 15x-5
y = - 15x-5
Exchange x and y
x = - 15y - 5
Solve for y
Add 5 to each side
x+5 = - 15y - 5+5
x+5 = - 15y
Divide by - 15
(x+5) / -15 = - 15y/-15
(x+5) / -15 = y
(x+5) / -15 = f^-1 (x)
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