the partial derivatvie with respect to y is is that right?
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Originally Posted by el123 the partial derivatvie with respect to y is is that right? Not quite. It's actually .
but i thought you treat x as a constant so its derivative is 0?
Originally Posted by el123 but i thought you treat x as a constant so its derivative is 0? Yes, it is treated like a constant. What do you do to differentiate a constant times a function? It's the constant times the derivative of that function. i.e. . So in your case, you have The is your constant. So the partial derivative will be .
true to that , thank you very much !
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