james03
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Would like help with this question
Question:y = 4ln3x, find dy/dx
1. I used the chain rule:
y=4ln u and u =3x
dy/du=4/u THIS IS MY PROBLEM
There is no number between the ln and u, eg. ln4u, so WHY do you use
d/dx ln(ax+b)=a/(ax+b)?
y=4ln u and u =3x
dy/du=4/u du/dx=3
dy/dx=12/3x=4x.
Question:y = 4ln3x, find dy/dx
Homework Equations
1. I used the chain rule:
y=4ln u and u =3x
dy/du=4/u THIS IS MY PROBLEM
There is no number between the ln and u, eg. ln4u, so WHY do you use
d/dx ln(ax+b)=a/(ax+b)?
The Attempt at a Solution
y=4ln u and u =3x
dy/du=4/u du/dx=3
dy/dx=12/3x=4x.