matlab 求数字积分

2）
clear
syms x
y=int(exp(2x)cos(x)^3,x, clear
syms x
y=int((1/(2pi)^{(1/2))*exp(-x}2/2),x,0,1)
y =
7186705221432913/36028797018963968erf(1/22^(1/2))*2(1/2)pi^(1/0,2pi)
y =
22/65exp(pi)^4-22/65vpa(ans,10)
(3)

clear
syms x
y=int(1/(2*pi)^(1/2)*exp(-x2/2),0,1);
vpa(y,14)
ans =
.34134474606855

2（4）
clear
syms x
y=int(x*log(x^4)*asin(1/x2),1,3);
Warning: Explicit integral could not be found.

In sym.int at 58
vpa(y,14)
ans =
2.4597721282375

2（5）
clear
syms x
y=int(1/(2*pi)^(1/2)*exp(-x2/2),-inf,inf);
vpa(y,14)
ans =
.99999999999999