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math question week 8 part 3

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2 Answers

f(X ) = 2X -7
 
 Change  f(x ) to Y
 
  Y = 2X -7
 
  Solve for X in terms of Y:
 
    X = (Y + 7 ) /2 
 
   Change X to f-1 ( X) and Y for X
 
 
     f-1 (x ) = 1/2 X +7/2