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sattari [20]
3 years ago
14

Which is the inverse of the function f(x)=1/3 x+5?

Mathematics
1 answer:
andreev551 [17]3 years ago
8 0
Replace the f(x) with y and proceed to make x the subject:
y=1/3x+5
y-5=1/3x
We need to ÷1/3 on both sides, so ×3 on both sides
3(y-5)=x
3y-15=x
Now swap y with x and replace the isolated x with f(x) so the inverse function is:
{f}^{ - 1}(x) = 3x - 15
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