12. If f(x) = 7 x +12, what is f-1(x) (the inverse function)?

• let y=f(x)=7x+12
  => x = (y-12)/7
  replace x to y
  f-1(x)= (x-12)/7 ans
• 9 years agoHelpfull: Yes(18) No(1)
• f(x) = 7 x + 12
  take both side f-1(x)
  f(f-1(x))= 7 f-1(x) + 12
  x= 7(f-1(x)) +12
  f-1(x) = (x-12)/7
• 9 years agoHelpfull: Yes(11) No(0)
• let y = 7x+12
  interchange x and y
  x = 7y+12 => y=(x-12) / y
• 9 years agoHelpfull: Yes(9) No(3)
• x-12/7 is the answer
• 9 years agoHelpfull: Yes(4) No(0)
• f(x)=7x+12
  or, y=7x+12
  or, x=7y+12 (every (x,y) has its (y,x) partner)
  or, y=(x-12)/7
  or, f-1(x)=(x-12)/7
• 9 years agoHelpfull: Yes(1) No(0)
• f(x)=7x+12
  y=7x+12
  7x=y-12
  x=y-12/7
• 9 years agoHelpfull: Yes(0) No(2)
• Let f-1(x)=y;
  x=f(y)=7y+12
  =>y=x-12/7
  =>f-1(x)=x-12/7
• 9 years agoHelpfull: Yes(0) No(0)