anonymous
  • anonymous
Help If f(x)=-3x+3, then f^-1(x)=
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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welshfella
  • welshfella
first find x in terms of f(x) can you do that?
anonymous
  • anonymous
no
welshfella
  • welshfella
ok its like solving for x f(x) = -3x + 3 add 3x to both sides f(x) + 3x = -3x + 3x + 3 the tems in x disappear on right side 3x + f(x) = 3 now subtract f(x) from both sides 3x = 3 - f(x) finally divide both sides by 3:- x = (3 - f(x)) / 3 replace f(x) by x and we have the inverse of f(x) f-1 (x) = (3 - x)/3

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welshfella
  • welshfella
that is it
anonymous
  • anonymous
so solve for the bottom one or is that the answer
welshfella
  • welshfella
That is the answer
welshfella
  • welshfella
f^-1 (x) is the inverse of f(x)
anonymous
  • anonymous
Thank you
welshfella
  • welshfella
yw
anonymous
  • anonymous
but how would you do this one If f(x)=3x-7, then f^-1(x)=
welshfella
  • welshfella
in a similar way to the first
anonymous
  • anonymous
i tried but i don't get it

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