How Can dv/dx Be Determined to Solve for dv/dt?

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SUMMARY

The discussion focuses on determining the value of dv/dx to solve for dv/dt using the chain rule and partial derivatives. The equation dv/dt is expressed as dv/dt = dv/dx * dx/dt + dv/dy * dy/dt, with dx/dt evaluated at (1,1) yielding -4. The user seeks to find the missing dv/dx to complete the calculation for dv/dt, which is currently represented as dv/dt = -4dv/dx - 8.

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Homework Statement


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Homework Equations


Chain rule, partial derivation

The Attempt at a Solution


dv/dt=dv/dx*dx/dt+dv/dy*dy/dt
dx/dt=-4t -> evaluate at (1,1) =-4
dv/dt=-4dv/dx+4(-2)
dv/dt=-4dv/dx-8

How can I find the missing dv/dx in order to get a value for dv/dt? Thanks!
 
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Did you expand the other derivatives to see if you get additional constraints from them?
 

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