1、
function y=exam3(m,n,er)
syms x xk
a=m;b=n;k=0;
ff=x^5+sin(x)-1;
while b-a>er
xk=(a+b)/2;
fx=subs(ff,x,xk);
fa=subs(ff,x,a);
k=k+1;
if fx==0
y(k)=xk;
break;
elseif fa*fx<0
b=xk;
else
a=xk;
end
y(k)=xk;
end
plot(y,'.-');
grid on
>> ab=exam3(0,1,1e-5);
>> vpa(ab,8)
3、
>> syms x
>> ff=x^3-2*x^2-5*x+12;
>> solve(ff)
4、
>> solve('exp(x)-2*x^2-1','x')
5、
>> solve('x^4+x-16','x')
9、
function f=exam6(x)
f(1)=2*x(1)-x(2)-2*sin(x(1));
f(2)=x(1)+3*x(2)-cos(x(2));
10、
>> syms x
>> a=[1,5,-1,6,-5,8];
>> roots(a)