Question

几个matlab题目求教。

有几个题目不会做，哪位能帮帮我么？
因为题目中含有积分运算符号，提问时候不好输入，就截了张图贴在下面。

Answer 1

syms x
y=int('sin(t)/t','t',0,x);
xx=0:0.01:2*pi;
yy=subs(y,x,xx);
plot(xx,yy)
y_4p5=subs(y,x,4.5)

%%%%%(2)
[x,y]=solve('x^2+y^2=1','x*y=2','x,y')

%%%%%(3)
dsolve('Dx=a*t^2+b*t','x(0)=2')

%%%%%(4)
[f,g]=dsolve('Df=3*f+4*g','Dg=-4*f+3*g','f(0)=0','g(0)=1','x')

Answer 2

图看不到啊？