need help...is the func. diff at x=0 or not?

Printable View

- April 22nd 2009, 01:37 AMadhyetacheck differentiability
need help...is the func. diff at x=0 or not?

- April 22nd 2009, 02:19 AMmr fantastic
- April 22nd 2009, 02:23 AMchisigma
If you compute the derivative of in as...

... for and is...

... no matter which is the sign of . So is differentiable in ...

Kind regards