# Inverse Function

• Dec 7th 2011, 06:19 PM
AlexWilson94
Inverse Function
Hey guys, here's the problem:

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I know how to do an inverse, I'm just having a very difficult time with this set of numbers.. Thank you so much!
• Dec 7th 2011, 06:32 PM
pickslides
Re: Inverse Function
For $y= \frac{1}{\sqrt{x^2-1}}$ swap y and x, then solve for y.
• Dec 7th 2011, 06:37 PM
Quacky
Re: Inverse Function
Brief tangent: am I the only person that found the wording of "verify the correctness of your answer" to be highly amusing?
• Dec 7th 2011, 06:47 PM
AlexWilson94
Re: Inverse Function
Haha, yeah my teacher is pretty intense.. :D
So, after swapping, I'm having a hard time doing the algebra.. :(
• Dec 7th 2011, 06:58 PM
Quacky
Re: Inverse Function
At first glance, I'd consider multiplying through by the denominator, then squaring both sides.
• Dec 7th 2011, 07:46 PM
pickslides
Re: Inverse Function
Quacky's idea is good, What did you get AlexWilson94?
• Dec 7th 2011, 08:00 PM
AlexWilson94
Re: Inverse Function
• Dec 7th 2011, 08:05 PM
pickslides
Re: Inverse Function
Looks good well done!
• Dec 7th 2011, 08:08 PM
AlexWilson94
Re: Inverse Function
Sweet! Would you mind helping me out with another problem I posted, it's in this same section on Cramer's Rule!