devan9552
devan9552 devan9552
  • 21-08-2019
  • Mathematics
contestada

What is the inverse function of d(x) = 2x - 4?

Respuesta :

jimrgrant1 jimrgrant1
  • 21-08-2019

Answer:

[tex]d^{-1}[/tex](x) = [tex]\frac{x+4}{2}[/tex]

Step-by-step explanation:

let d(x) = y and rearrange making x the subject, that is

2x - 4 = y ( add 4 to both sides )

2x = y + 4 ( divide both sides by 2 )

x = [tex]\frac{y+4}{2}[/tex]

Change y back into terms of x, so

[tex]d^{-1}[/tex](x ) = [tex]\frac{x+4}{2}[/tex]

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