Implicit Differentiation with the Product Rule | Calculus
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Implicit Differentiation with the Product Rule | Calculus
13 просмотров · 2 нед. назад
Infinity The Math Institute
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13 просмотров · 2 нед. назад
Calculus | Implicit Differentiation & Derivatives
How do you find dy/dx when x and y appear together in the same equation?
In this clip from Infinity’s Saturday Morning Math Help Live, Perla works through two Calculus problems involving implicit differentiation:
x² + 3xy + y² = 12
and
x²y + y³ = 10
Mr. Bru explains how to:
• Differentiate both sides with respect to x
• Remember that y is a function of x
• Attach dy/dx when differentiating terms containing y
• Use the Product Rule on terms such as xy and x²y
• Collect all terms containing dy/dx
• Factor out dy/dx
• Isolate the derivative and simplify
For the first equation:
dy/dx = -(2x + 3y)/(3x + 2y)
For the second equation:
dy/dx = -2xy/(x² + 3y²)
Implicit differentiation becomes much easier once you recognize that every time you differentiate y, the Chain Rule requires a factor of dy/dx.
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