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marcelie
 one year ago
help please !!!! find the inverse
f(x) 3x^2+5
please check my work
marcelie
 one year ago
help please !!!! find the inverse f(x) 3x^2+5 please check my work

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marcelie
 one year ago
Best ResponseYou've already chosen the best response.0dw:1443237553803:dw

steve816
 one year ago
Best ResponseYou've already chosen the best response.1that is some really messed up handwriting xD

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0the answer in my textbook says it 

steve816
 one year ago
Best ResponseYou've already chosen the best response.1I wish I can help you, but it is too hard to read my friend.

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0sorry lol can you solve it ?

steve816
 one year ago
Best ResponseYou've already chosen the best response.1But to find the inverse, simply switch the x and y and solve for y.

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0k one sec let me rewrite it

steve816
 one year ago
Best ResponseYou've already chosen the best response.1subtract 5, divide by 3, square root it.

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0dw:1443237871401:dw

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0dw:1443238092545:dw

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0why does my textbook answer has the negative infront of the equation

steve816
 one year ago
Best ResponseYou've already chosen the best response.1Because you messed up a little bit.

steve816
 one year ago
Best ResponseYou've already chosen the best response.1Don't be. Life has many confusing moments.

steve816
 one year ago
Best ResponseYou've already chosen the best response.1But never give up and keep trying until you are successful!

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0\[f (x ) = 3x ^{2}+5\]

steve816
 one year ago
Best ResponseYou've already chosen the best response.1\[y = \frac{ \sqrt{x5} }{ \sqrt{3} }\]

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0so do i first divide then square root it ? because i always get confused

steve816
 one year ago
Best ResponseYou've already chosen the best response.1You have to rationalize the denominator but I'm too lazy you can do that :)

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0isnt the answer that ?

steve816
 one year ago
Best ResponseYou've already chosen the best response.1no, you can't have a square root in the denominator.

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0mmk bc my solution has that answer and i dont understand why has negative

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2\[\sqrt{\frac{ a }{ b }}=\frac{ \sqrt{a} }{ \sqrt{b} }\]

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2recall, when you solve y = x^2 x = +root(y) or x=  root(y)

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0oh , so then i have to write /+

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0soo every inverse has to have that /+ when i take the sq root ?

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2no, that is just a property of square roots

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2but you have to figure which is the right answer

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0oh bc most of the problems ive done are sq roots but my solotuin book doesnt include /+

marcelie
 one year ago
Best ResponseYou've already chosen the best response.0how do i figure that out

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2also another thing to note, \[\sqrt{y^2} = \left y \right\] the square root of y^2 will always be positive, and is really the absolute value of y, not just y

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2and a 3rd recall, the absolute value function is defined dw:1443239752302:dw

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2that is where the negative comes in

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2Also as an aside, since you are (x,y) >(y,x) swapping y and x, The inverse, if there is one, is a reflection over the line y = x ; through the origin slope 1

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2notice the intervals they specified, they include all real numbers, but why break it up to that...

DanJS
 one year ago
Best ResponseYou've already chosen the best response.2Do they give just the negative root as an answer or both + and  roots depending on which interval you are talking about in the domain
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