sorry i entered it wrong the first time e^(x+y)+x-y^2=3
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All we do for this is differentiate implicitly with respect to x, treating y as a separate variable: We have: Now we differentiate: When we differentiate y, we differentiate it just like we would x, but we add a after it: And there you go.
Originally Posted by Aryth That is not true. The product rule needs to be used if you were to go about it that way: However, it is sufficient to simply know that: . Here, we see that u = x + y, so: etc. etc.
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