I want to solve this implicit derivative

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Muhammad Daniyal
Muhammad Daniyal 2016-12-23
编辑： Karan Gill 2017-10-17
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
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John D'Errico
John D'Errico 2016-12-23
编辑：John D'Errico 2016-12-23
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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回答（2 个）

Walter Roberson
Walter Roberson 2016-12-23
dsolve('x^2+D2y=100')
Karan Gill
Karan Gill 2016-12-23
编辑：Karan Gill 2017-10-17
Use "dsolve" : https://www.mathworks.com/help/symbolic/dsolve.html
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
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Walter Roberson
Walter Roberson 2016-12-26
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 2017-1-10
Thanks for reporting the bug, as always. We are looking into it.

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