Posted by **Kim** on Tuesday, October 30, 2007 at 11:01am.

Hello I trying to do a problem on partial derivative. I know the partial derivative of 3x+2y with respect to x would be 3 and with respect to y would be 2. But wut if it is squarroot of 3x+2y, wut is the partial derivative of it with respect to x and y

- Partial derivative -
**drwls**, Tuesday, October 30, 2007 at 11:31am
For d/dx(partial)of (3x + 2y)^1/2, just treat y as a constant and use the usual rules. In this case, use the chain rule and let u = 3x + 2y

df/dx = df/du*du/dx

d/dx(partial)of (3x + 2y)^1/2

=(1/2)(3x + 2y)^-1/2 * 3

= (3/2)(3x + 2y)^-1/2

- Partial derivative -
**Kim**, Tuesday, October 30, 2007 at 12:25pm
k tnx for ur help

- math -
**jacku**, Sunday, October 16, 2011 at 12:09pm
-5(3x+2)

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