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OpenStudy (anonymous):
Use implicit differentiation to find the second derivative x^2+2y^3=4
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OpenStudy (raspberryjam):
Did you find the first derivative yet?
OpenStudy (anonymous):
yes i have i got yprime=-2x/6y
OpenStudy (raspberryjam):
Yep, so just take the derivative again and then whenever you see dy/dx just substitute back in with -2x/6y.
OpenStudy (raspberryjam):
Whoops wait, you forgot to square the 6y..it should be dy/dx = -2x/6y^2
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