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August 5, 2015

Homework Help: Urgent math

Posted by Brian on Saturday, April 20, 2013 at 5:24pm.

If f(x, y, z)=sin(3x-yz), where x=e^(t-1), y=t^3, z=t-2, what's df/dt(1)?

x(1)=1 y(1)=1 z(1)=-1
df/dt=(3cos(3x-yz))(e^(t-1))+(cos(3x-z))(3t^2)+(cos(3x-y))(1)

I seriously need help on this and tell me the answer and show your work through steps. Thanks.

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