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Post by Admin on Apr 1, 2018 6:09:01 GMT
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Gary
GaryVasco
Posts: 3,352 
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Post by Gary on Apr 1, 2018 15:27:44 GMT
Vasco, How would you enter it for y'' when y' = x/y? I did set the options. OK, I think I have it now. It seems to want you to complete the last step of substituting x/y for y'. The second one is the same one I listed. Perhaps you listed it earlier and I forgot it. Gary |
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Post by Admin on Apr 1, 2018 16:10:54 GMT
Vasco, How would you enter it for y'' when y' = x/y? I did set the options. OK, I think I have it now. It seems to want you to complete the last step of substituting x/y for y'. The second one is the same one I listed. Perhaps you listed it earlier and I forgot it. Gary Gary I can't see a way to use it for something like $y'=(x/y)$ to obtain $y''$, but if you know that $x^2-y^2=c$, then you can ask it to differentiate twice - that works. I put the reference to the second one in my post because you brought it to my attention - thanks. Vasco |
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