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Braylon Farley
Mathematics
23 October, 15:51
If ƒ (x) = 3x + 1 and ƒ - 1 =, then ƒ - 1 (7) =
+3
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1
)
Houston Wilkinson
23 October, 16:20
0
F (x) = 3x + 1
let f (x) = y
y = 3x + 1
y - 1 = 3x
3x = y - 1
x = (y - 1) / 3
From y = f (x), x = f⁻¹ (y)
x = (y - 1) / 3
f⁻¹ (y) = (y - 1) / 3
f⁻¹ (7) = (7 - 1) / 3 = 6/3 = 2
f⁻¹ (7) = 2
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