anonymous
  • anonymous
Help If f(x)=2x, then f^-1(x)= -2x ½x x - 2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Ness9630
  • Ness9630
Switch x and y and solve for y y=2x ==> x=2y
Psymon
  • Psymon
We can say f(x) is the same as y. So basically we have y = 2x. To find the inverse, switch x and y and then resolve for y. So if we switch x and y we have x = 2y Now all we do is solve for y, meaning divide both sides by 2 to get y = x/2 or as you put, (1/2)x
anonymous
  • anonymous
Thank you guys :)

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Psymon
  • Psymon
Mhm ^_^
Ness9630
  • Ness9630
Not surprised Psymon ;)
austinL
  • austinL
So, if you wanted to solve for \(f(x) = 2x+3\) \(f^{-1}(x)=?\)
Psymon
  • Psymon
If you wanted to do that, we would first switch x and y, meaning we would have: x = 2y + 3 Now as above, you would now solve for y. So subtracrting both sides by 3 and then dividing by 2, we get (x-3)/2 = y @austinL
Ness9630
  • Ness9630
No need to teach Austin, Psymon
Psymon
  • Psymon
Why not? He asked, I have no reason not to answer.
austinL
  • austinL
It was directed at the asker to test their knowledge.
Ness9630
  • Ness9630
I think he was asking Jess xD
Psymon
  • Psymon
Well, provided he only wanted an answer, I hope he doesnt mind that I answered instead xD
austinL
  • austinL
But yeah, I am slightly past this stage in mathematics :P
Psymon
  • Psymon
Fair enough xD
Ness9630
  • Ness9630
Slightly? I think diff eq qualifies more than slightly
Psymon
  • Psymon
Haha, that, I think Diff Eqs is in another league from this xD
austinL
  • austinL
It really is a whole 'nother beast really.
Psymon
  • Psymon
Im in diff eq now, haha.

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