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DeadShot
Group Title
If f(x) = x plus 2, all over 2, then what is f^1(x) ?
 one year ago
 one year ago
DeadShot Group Title
If f(x) = x plus 2, all over 2, then what is f^1(x) ?
 one year ago
 one year ago

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kropot72 Group TitleBest ResponseYou've already chosen the best response.1
\[y=\frac{x+2}{2}\] The next step is to interchange x and y. Do you want me to take you thru it?
 one year ago

agradecompetent Group TitleBest ResponseYou've already chosen the best response.0
2(x1)
 one year ago

agradecompetent Group TitleBest ResponseYou've already chosen the best response.0
=2(x1)
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
yes, i don't understand this kind of problem
 one year ago

agradecompetent Group TitleBest ResponseYou've already chosen the best response.0
okay let's do it step by step
 one year ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.1
When we interchange x and y we get \[x=\frac{y+2}{2}\] Now we need to solve for y by multiplying both sides by 2 giving\[2x=y+2\] Now you can subtract 2 from both sides to find y which is \[f ^{1}(x)\]
 one year ago

DeadShot Group TitleBest ResponseYou've already chosen the best response.0
so then, it would be 2x  2 = y, right?
 one year ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.1
@DeadShot Good work. Youare correct. You can factorise 2x  2 = 2(x  1)
 one year ago

agradecompetent Group TitleBest ResponseYou've already chosen the best response.0
f(x) = (x+2)/2 =>y=(x+2)/2 2y= x+2 x=2y2 x=2(y1) find f^1(x) f^1(x) = 2(x1)
 one year ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.1
You're welcome :)
 one year ago

agradecompetent Group TitleBest ResponseYou've already chosen the best response.0
you are welcome Deadshot
 one year ago

Pibe Group TitleBest ResponseYou've already chosen the best response.0
so is it 2x2 or 2x1?
 one year ago
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