anonymous
  • anonymous
What is the inverse of f(x) = 2x − 8?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
To find the inverse of a function you are first gonna need to replace f(x) with y. Then you have to flip the x and y variables and solve for y. @sherlocked1270
rishavraj
  • rishavraj
follow the steps http://www.coolmath.com/algebra/16-inverse-functions/05-how-to-find-the-inverse-of-a-function-01
anonymous
  • anonymous
f(x) = 2x − 8 y = 2x − 8 x = 2y − 8 x+8=2y and so on..

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More answers

anonymous
  • anonymous
wait so what do I do after I get to x=2y+1
johnkim2330
  • johnkim2330
you solve for y 2y=x-1 y=(x-1)/2
UsukiDoll
  • UsukiDoll
\(\color{blue}{\text{Originally Posted by}}\) @sunleaf01 f(x) = 2x − 8 y = 2x − 8 x = 2y − 8 x+8=2y and so on.. \(\color{blue}{\text{End of Quote}}\) After this step we are supposed to divide 2 throughout the equation.
johnkim2330
  • johnkim2330
can someone help me with my question http://openstudy.com/updates/55a65b2be4b0f93dd7c4162d
anonymous
  • anonymous
how do I remove the parentheses from Y=(x-1)/2
rishavraj
  • rishavraj
how did u get tht??? y = 2x + 8 switch x and y x = 2y + 8 x - 8 = y x/2 - 4 = y now stick inverse notation
UsukiDoll
  • UsukiDoll
there's an error. Everything is fine until x+8=2y divide 2 throughout the entire equation to have y by itself the fraction part is correct, but we should have a 4
anonymous
  • anonymous
ok I'm going on break see u later
rishavraj
  • rishavraj
u will get x - 8 = 2y so (x - 8)/2 = y x/2 - 8/2 = y x/2 - 4 = y
johnkim2330
  • johnkim2330
@rishavraj i ony saw sherlocked questin with x=2y+1 haha my bad i didnt see ur guys responses
UsukiDoll
  • UsukiDoll
that's alright. mistakes do happen ^^
johnkim2330
  • johnkim2330
anonymous
  • anonymous
so u were saying that you have to get rid of the F(x) but in the answers that are provided It has f(x) f^-1(x)=1/2x-8 f^-1(x)=1/2x+4 f^-1(x)=1/2+8 f^-1(x)=2x+16
anonymous
  • anonymous
hey
anonymous
  • anonymous
hi
rishavraj
  • rishavraj
see my just previous reply... i ended with y = x/2 + 4 replace y from f^-1(x) so it woud be f^-1(x) = x/2 + 4
anonymous
  • anonymous
oh ok thank u :D
rishavraj
  • rishavraj
u welcome :))))
anonymous
  • anonymous
ans is x+8 ------- 2

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