Ask your own question, for FREE!
Mathematics 14 Online
OpenStudy (anonymous):

Differentiate (ln(f+g))

OpenStudy (jamesj):

This should now be easy for you, if you found the derivative of ln(fg). For the record \[ \frac{d \ }{dx} ln (f) = \frac{f'}{f} \]

OpenStudy (anonymous):

I understand ln(fg) = f'/f+g'/g, but what differently do I do here?

OpenStudy (jamesj):

so d/dx ln(u) = u'/u. Write here u = f + g. Then d/dx ln(u) = .... what?

OpenStudy (jamesj):

d/dx ln(u) = u'/u = ....

OpenStudy (anonymous):

f+g/f'+g'?

OpenStudy (jamesj):

careful

OpenStudy (anonymous):

Ooops lol. f'+g'/f+g

OpenStudy (jamesj):

d/dx ln(u) = u'/u = (f + g)' / (f + g) = ....

OpenStudy (jamesj):

yes

OpenStudy (anonymous):

Thanks a bunch. You officially have what I like to call Swag.

OpenStudy (jamesj):

Much obliged ;-)

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
kaelynw: starting to draw a hand
1 day ago 16 Replies 2 Medals
Twaylor: Rate it :D (Took 2 days)
2 days ago 7 Replies 0 Medals
XShawtyX: Art, Short Writing Assignment: Imagining Landscapes
2 hours ago 6 Replies 1 Medal
XShawtyX: Chemistry, Help ud83dude4fud83cudffe
2 days ago 13 Replies 1 Medal
kaelynw: tried a lil smt, the arm is off but i like the other stuff
3 days ago 27 Replies 3 Medals
kaelynw: art igg
3 days ago 14 Replies 1 Medal
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!