ceci03r
ceci03r ceci03r
  • 26-02-2018
  • Mathematics
contestada

What is the inverse function of y=x^2-7

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iGreen
iGreen iGreen
  • 26-02-2018
With inverse functions you just swap 'x' and 'y' and solve for 'y'.

[tex]\sf y=x^2-7[/tex]

Swap 'x' and 'y':

[tex]\sf x=y^2-7[/tex]

Add 7 to both sides:

[tex]\sf x+7=y^2[/tex]

Take the square root of both sides:

[tex]\sf y=\boxed{\sf\pm\sqrt{x+7}}[/tex]
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