Another question about implicit differentiation.

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SUMMARY

Implicit differentiation is a crucial technique in calculus that allows for the differentiation of equations where y cannot be easily expressed in terms of x. In the example provided, the equation x² + y² = 100 can be solved for y, but this approach complicates the differentiation process. The derivative obtained through implicit differentiation, dy/dx = -x/y, is essential for functions where y cannot be isolated. This method simplifies the differentiation of more complex relationships between variables.

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  • Understanding of basic calculus concepts, including derivatives and the chain rule.
  • Familiarity with implicit functions and their properties.
  • Knowledge of algebraic manipulation to handle equations involving x and y.
  • Experience with differentiating functions in both explicit and implicit forms.
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  • Study the concept of implicit differentiation in detail, focusing on its applications in complex equations.
  • Learn how to apply the chain rule effectively in implicit differentiation scenarios.
  • Explore examples of functions where y cannot be easily isolated and practice implicit differentiation on them.
  • Review the geometric interpretation of implicit functions and their derivatives.
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Students and educators in calculus, mathematicians exploring advanced differentiation techniques, and anyone seeking to deepen their understanding of implicit functions and their derivatives.

jaydnul
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Say you have x^2+y^2=100. why can't you just solve for y, so y=+- √(100-x^2) then use the chain rule to find the derivative. so y'= +- x/√(100-x^2). Then you can just deduce that y'= -x/y. What is the point of adding all the dy/dx in the equation? Seems like it just complicates it.
 
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The point of implicit differentiation is that it avoids having to find x in terms of y before taking the derivative. In the example function you have chosen, y can be found in terms of x easily. There are functions where such is not the case. Implicit differentiation is the only technique which can be used in those cases.
 

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