i know that if a function is differentiable on X_0

then lim [f(x+x_0)-f(x_0)]/[x-x_0] exist

[IMG]file:///C:/DOCUME%7E1/lun/LOCALS%7E1/Temp/moz-screenshot.jpg[/IMG]http://img294.imageshack.us/img294/2...4365mj9.th.gif

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- Jan 20th 2009, 11:06 AMtransgalacticon what point these function are differentiable..
i know that if a function is differentiable on X_0

then lim [f(x+x_0)-f(x_0)]/[x-x_0] exist

[IMG]file:///C:/DOCUME%7E1/lun/LOCALS%7E1/Temp/moz-screenshot.jpg[/IMG]http://img294.imageshack.us/img294/2...4365mj9.th.gif - Jan 20th 2009, 12:50 PMMathstud28
- Jan 21st 2009, 07:40 AMtransgalactic
regarding A:

you descibed the function correctly

how do you choose what numbers to pick

after that i just put them into the formula

and if i get a final limit then its deferentiable on that point.

how do you choose what numbers to pick?

regarding b:

how did you know to check for 0

and only for 0

?? - Jan 24th 2009, 12:52 PMtransgalactic
how to choose what points to test

??