Question 1199306
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            Below is my note to the solution by  Edwin.



<pre>
I  fully agree on how Edwin deduced equation 

    {{{int(dy/y)}}}{{{""=""}}}{{{int(dx/x)}}}      (*)


But what follows, should be corrected, because 

    {{{int(dy/y)}}} is not ln(y):  it is ln(|y|);    {{{int(dx/x)}}} is not ln(x):  it is ln(|x|)

                            with y =/= 0;                            with x =/= 0.


Therefore, from (*) we have

    ln(|y|) = ln(|x|) + ln(C),  x =/= 0;  y =/= 0

    y = Cx,  with  x =/= 0,;  y =/= 0;  C may have any sign, positive or negative, except C = 0.
</pre>



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It is with regret I see that Edwin (@mccravyedwin) ascribes to me what I did not say and did not write.



&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Edwin, &nbsp;it is a prohibited way to make a discussion.


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I said what I said, &nbsp;and what &nbsp;I &nbsp;said was right.



Happy New Year !