airyana1114
  • airyana1114
Let f(x)=2x+2. Solve f^-1(x) when x=4. I believe I know how to do this problem, if someone would just walk through it with me.
Mathematics
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
First you need to find the inverse function. Do you know how to do that?
airyana1114
  • airyana1114
I believe so. My first step to finding the inverse function would be to replace f^-1 with y and then switch my x and y variables right? @Tommynaiter
anonymous
  • anonymous
Yes, that is correct. You switch x and y and then isolate y. If you do this, what function do you get then?

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airyana1114
  • airyana1114
I got |dw:1442875997469:dw|
anonymous
  • anonymous
Yeap! That is the inverse function, now you just insert 4 and solve it :)
anonymous
  • anonymous
Yes
airyana1114
  • airyana1114
Thank you! @Tommynaiter
anonymous
  • anonymous
You're welcome :)

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