i try do it but only first one #_# 2 and 3 i dont know how can do #_#(Headbang)

http://www4.picturepush.com/photo/a/...40/2822122.jpg

Thanks.

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- Jan 24th 2010, 08:42 AMliptonpcInvertible functions
i try do it but only first one #_# 2 and 3 i dont know how can do #_#(Headbang)

http://www4.picturepush.com/photo/a/...40/2822122.jpg

Thanks. - Jan 24th 2010, 08:54 AMJhevon
- Jan 24th 2010, 12:22 PMliptonpc

is it correct ? - Jan 24th 2010, 12:31 PMJhevon
- Jan 24th 2010, 01:22 PMliptonpc
sorry i dont understand #_#

so the result is ? - Jan 24th 2010, 02:16 PMJhevon
- Jan 25th 2010, 12:26 PMliptonpc

when i check

so why it not inverse? - Jan 25th 2010, 12:31 PMJhevon
- Jan 25th 2010, 12:41 PMliptonpc
if

and same thing it not inverse? - Jan 25th 2010, 12:45 PMJhevon
- Jan 25th 2010, 12:47 PMemathinstruction

You use the vertical line test to check if something is a function. Then, if it is a function, you use the horizontal line test to see if it has an inverse. If it does not pass the horizontal line test, then it isn't an invertible function

The reason if because the (fake) inverse function that you would get would spit out 2 values for (almost) every x value when talking about parabolas, as shown by the in the problem above, and when that happens it cant be a function - Jan 25th 2010, 12:49 PMliptonpc
yeah #_# because i usually think i forgot they didt say this ^^

thanks ^^ - Jan 25th 2010, 01:01 PMliptonpc
but if dont ask about inverse or not. Just ask Find

so i have to answer

or

??? - Jan 25th 2010, 01:25 PMJhevon
- Jan 25th 2010, 01:30 PMliptonpc
^^ thanks u ^^