donnie1999
  • donnie1999
What is the inverse of the function below? f (x) = 2x + 12 _________ 5
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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donnie1999
  • donnie1999
@dcskaf
anonymous
  • anonymous
x= 2y+12 ----- 5 multiply 5 then subtract and finally divide
donnie1999
  • donnie1999
i got f-^1(X)= 14/5 x ???

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anonymous
  • anonymous
Ok lets go through it together x= 2y+12 ----- 5 multiply 5 you get 5x=2y+12
anonymous
  • anonymous
ok so far?
donnie1999
  • donnie1999
ya
anonymous
  • anonymous
then you subtract 12 to get 5x-12 =2y
donnie1999
  • donnie1999
so would it be f-^1(x)= -2x+12 ------ ???? 5
anonymous
  • anonymous
not quite it should be y= 5x-12 ----- 2 which simplifies to either 2.5x-6 or 5/2x-6
anonymous
  • anonymous
do you get it?
donnie1999
  • donnie1999
idk would it be f-^1(x)= 5/2x - 6 then???
anonymous
  • anonymous
yes

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