Hello, I'm wondering how I can show that for all functions which satisfy: that the following is true: Where Thanks very much for your help Jon
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Originally Posted by jonmondalson Hello, I'm wondering how I can show that for all functions which satisfy: I assume that those d's in the second term should be partials? that the following is true: Where That result is not true. For example, if , and then but .
What is true is that if you let s= x+ y, t= s- y, then the equation becomes and, from that, where F and G are any differentiable functions of a single variable.
Originally Posted by HallsofIvy What is true is that if you let s= x+ y, t= s- y, then the equation becomes and, from that, where F and G are any differentiable functions of a single variable. Thanks bud, but can I ask, how do you calculate , for example when s= x+ y and t= s- y, as in your example?
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