Why Do Different Forms of the Same Equation Yield Different dy/dx Results?

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SUMMARY

The discussion centers on the differentiation of the equation xy=c² using implicit differentiation and explicit differentiation. When applying implicit differentiation, the result is dy/dx = -y/x. Conversely, when the equation is rewritten as y = c²/x and differentiated explicitly, the result is dy/dx = -c²/x². Both forms yield equivalent results, as -y/x simplifies to -c²/x², confirming that the differentiation methods are consistent and correct.

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vikcool812
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I have a relation xy=c2 , if i apply implicit differentiation to both sides i get dy/dx =-y/x , but if i write the same thing as y=c2/x , then dy/dx comes out to be -c2/x2 , what's going wrong ?
 
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vikcool812 said:
I have a relation xy=c2 , if i apply implicit differentiation to both sides i get dy/dx =-y/x , but if i write the same thing as y=c2/x , then dy/dx comes out to be -c2/x2 , what's going wrong ?

If xy=c2, then y=c2/x. So -y/x = -c2/x2 You got the same answer, just in a different form
 
vikcool812 said:
I have a relation xy=c2 , if i apply implicit differentiation to both sides i get dy/dx =-y/x , but if i write the same thing as y=c2/x , then dy/dx comes out to be -c2/x2 , what's going wrong ?
Nothing since -y/x = -c²/x2 !
 

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