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26-06-2020
Mathematics

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If f(x) = 6 - 5x, what is f(x)^-1? (check attachment)

If fx 6 5x what is fx1 check attachment class=

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jimthompson5910 jimthompson5910

26-06-2020

f(x) = 6-5x

y = 6-5x .... replace f(x) with y

x = 6-5y .... swap x and y; solve for y

x+5y = 6

5y = 6-x

y = (6-x)/5

[tex]f^{-1}(x) = \frac{6-x}{5}[/tex] ... replace y with the inverse function notation

Answer: Choice D.

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