alvarotrevino11
alvarotrevino11 alvarotrevino11
  • 24-11-2016
  • Mathematics
contestada

If f(x)=7-9x, find f^-1=(5).

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maryam2sadia maryam2sadia
  • 25-11-2016
 Replace f(x) with y 


 Swap x and y 


 Multiply both sides by y-2 


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