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OpenStudy (anonymous):
find y' by implicit differentiation a. 4x^2+9y^2=36 b. .5x+.5y-4=0
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myininaya (myininaya):
\[(4x^2)'=?\]
myininaya (myininaya):
What is derivative of 4x^2?
OpenStudy (anonymous):
8x
myininaya (myininaya):
(9y^2)'=?
OpenStudy (anonymous):
18x
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myininaya (myininaya):
18y*y' <----because the derivative of y is y'
myininaya (myininaya):
So we have \[8x+18yy'=0\] Solve for y'
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