how do i find the roots of this function? the function is attached
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x=-10:1:10;
y=x.^3-x.^2+5.*x.*sin((pi().*x)/4-(pi()*5)/4)+3;
y1=0;
plot(x,y,x,y1)
xlabel('x'); grid on
ylabel('y')
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Answers (2)
Azzi Abdelmalek
on 12 Aug 2016
Edited: Azzi Abdelmalek
on 12 Aug 2016
syms x
y=x^3-x^2+5*x*sin(pi*x/4-5*pi/4)+3
solve(y)
To find all the roots, you can use fsolve
y=@(x) x^3-x^2+5*x*sin(pi*x/4-5*pi/4)+3
x0=-0.5 % first starting point
x1=fsolve(y,x0)
x0=2 % second starting point
x2=fsolve(y,x0)
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