nicholebrabham43 nicholebrabham43
  • 03-11-2019
  • Mathematics
contestada

If f(x) and rl (x) are inverse functions of each other and f(x) = 2х+5, what is rl (8) ?
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kudzordzifrancis
kudzordzifrancis kudzordzifrancis
  • 07-11-2019

Answer:

r(8)=1.5

Step-by-step explanation:

The given function is [tex]f(x)=2x+5[/tex]

when f(x)=8, we have [tex]8=2x+5[/tex]

This implies that:

[tex]8-5=2x[/tex]

[tex]3=2x[/tex]

[tex]x=1.5[/tex]

Hence the point (1.5,8) lies on f(x)

The inverse of function r(x) will have the corresponding point (8,1.5)

This means that:

[tex]r(8)=1.5[/tex]

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