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hartnnBest ResponseYou've already chosen the best response.2
y= x it has "V" like shape, at x = 0 it is continuous , but not differentiable.
 4 months ago

ikram002pBest ResponseYou've already chosen the best response.0
exactly...but how cud i find a function f(x,y) cont but not diff :)
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
differentiable has to do with limits, if the limits is not the same from all directions, the limit is undefined.
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
edit*** and the derivative of y=x is y' = x/x
 4 months ago

ikram002pBest ResponseYou've already chosen the best response.0
in fact not necessary i mean if the limit exist its continues any way .. i wanna continues fun but not diff in f(x,y)
 4 months ago

hartnnBest ResponseYou've already chosen the best response.2
means a 2 variable function example....hmm
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
i recall one function i was limiting, but it was an implicit i think
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
anything with a undefineable partial should suffice
 4 months ago

hartnnBest ResponseYou've already chosen the best response.2
yeah, not sure about this, but try f(x,y) = xy
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=%28x%2By1%29%2F%28%7Cx%2By%7C1%29 heres a nice one
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
xy reminds me of one of those paper folded beaks ....
 4 months ago

ikram002pBest ResponseYou've already chosen the best response.0
it sounds good but i have to check my txt book to use the definition to know if its not diff
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
im assuming "not differentiable" means that for some x in R, the derivative does not exist.
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
Derelict function comes to mind for some reason as well
 4 months ago

ikram002pBest ResponseYou've already chosen the best response.0
yes its correct :) but the one u gave is also not continues there is a thm if the fun is diff then its continues ima give a counter example for the oposite situation like give an example for fun is cont but not diff
 4 months ago

ikram002pBest ResponseYou've already chosen the best response.0
@hartnn gave a good example but one variable im gonna to check if xy is true
 4 months ago

amistre64Best ResponseYou've already chosen the best response.1
http://www.wolframalpha.com/input/?i=%7Csin%28x%2By%29%7C this one is rather nice looking to me
 4 months ago

sdfasfasdfasdfasdfafdBest ResponseYou've already chosen the best response.0
im sorry for barging on your question ikram
 4 months ago

ikram002pBest ResponseYou've already chosen the best response.0
it works !! both xy sin(x+y) thx both @hartnn @amistre64
 4 months ago
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