Ask your own question, for FREE!
Mathematics 78 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
Aliciaa: finally done for @Ylynnaaa_120
59 minutes ago 8 Replies 2 Medals
Aliciaa: finally done!!! for Ylynnaaa_120
1 hour ago 0 Replies 0 Medals
Ylynnaa: I drew my auntie) this was 3 weeks agoud83dudc80ud83dudc80
33 seconds ago 30 Replies 7 Medals
Ylynnaa: A art i made 3 weeks ago
1 hour ago 0 Replies 0 Medals
Aliciaa: Collage request: Harriet Tubman for: @KarmaXD
1 hour ago 15 Replies 2 Medals
vizer: Can someone explain to me why i feel so empty?
1 hour ago 8 Replies 0 Medals
Cheyyy: Love hurts. Why does love hurt si much
54 seconds ago 20 Replies 2 Medals
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!