I want to solve this implicit derivative

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Muhammad Daniyal
Muhammad Daniyal on 23 Dec 2016
Edited: Karan Gill on 17 Oct 2017
I want to solve this implicit derivative X^2+y^2=100 using MATLAB ? I want complete solution can any one please help me in this . I am very thankful
  3 Comments
John D'Errico
John D'Errico on 23 Dec 2016
Edited: John D'Errico on 23 Dec 2016
What implicit derivative? That looks like no more than the equation of a circle. Do you just want to compute dy/dX? What is not working? By the way, answers is not here to do your homework (as this clearly is), so that you want a complete solution is something we should not be giving you anyway.
So, when you say it is not working, what have you tried?

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Answers (2)

Walter Roberson
Walter Roberson on 23 Dec 2016
dsolve('x^2+D2y=100')
  1 Comment
Karan Gill
Karan Gill on 23 Dec 2016
Please don't use string input to "dsolve". See my answer below.

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Karan Gill
Karan Gill on 23 Dec 2016
Edited: Karan Gill on 17 Oct 2017
syms y(x)
D2y = diff(y,x,2);
eqn = x^2 + D2y == 100;
sol = dsolve(eqn)
sol =
C2 + (x*(- x^3 + 600*x + C1))/12
Karan
  4 Comments
Walter Roberson
Walter Roberson on 26 Dec 2016
I just encountered a case that works for the string version but fails for the expression version due to a toolbox bug. :(
(Karan, if you are interested, see case 02340431, just filed.)
Karan Gill
Karan Gill on 10 Jan 2017
Thanks for reporting the bug, as always. We are looking into it.

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