Question

find dy/dx from y = e^-x * lnx

Answer 1

Hmm so we certainly have product rule on this one! :D Unlike the last heh

Answer 2

Is the ln(x) in the exponent or a seperate term?

Answer 3

yea i did product rule and had -e^x *lnx + e^-x *1/x

Answer 4

Yah looks good! :) Pshhh you don't need our help, yer doin fine \:D/

Answer 5

Oh oh tiny mistake, i see :O hmm

Answer 6

When you take the derivative of the exponential term, it stays the same right? And you also multiply by the derivative of the exponent (by the chain rule). So that's where the negative sign came from, from the chain rule.
But your exponent should still be -x! :O

Answer 7

oh i forgot the - on the exponent? that's it? lol

Answer 8

yah :3 heh looks good besides that.

Answer 9

-e^-x * lnx is just -x right?

Answer 10

@zepdrix ?

Answer 11

o sorry didn't see yer message :3