bisection method with log

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Mohamad Mourad
Mohamad Mourad 2020-4-2
评论： Mohamad Mourad 2020-4-5
if a=15
b=60
Sy=1070
p= 700
how can i find c using bisection method
P= (Sy/3)*(1-(c^2/b^2)+log(c^2/a^2))

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回答（1 个）

David Hill
David Hill 2020-4-2
Once you graph your function, you see there are 4 roots. Using the bisection method to find the numerical roots should now be easy.
a=15;
b=60;
Sy=1070;
p=700;
c=-150:.1:150;
y=@(c)(Sy/3)*(1-(c.^2/b^2)+log(c.^2/a^2))-p;
plot(c,y(c));

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