实验6 Matlab数值计算(7)

实验6 Matlab数值计算

dx4=diff(f([pi/2,0.001+pi/2]))/0.001; dx1 dx2 dx3 dx4 >> dx1 = 0 dx2 = 0 dx3 = 0 dx4 = 0 （2

）f(x) x 1,2,3

(2)

f=inline('(x.^2+1).^(0.5)'); dx1=diff(f([1,0.001+1]))/0.001; dx2=diff(f([2,0.001+2]))/0.001; dx3=diff(f([3,0.001+3]))/0.001; dx1 dx2 dx3 >> dx1 = 0.7073 dx2 = 0.8945

dx3 = 0.9487

8. 用数值方法求定积分。

（1

）I1

2 0

的近似

值。

fun=inline('(cos(t.^2)+4.*sin((2.*t).^2)+1).^(1/2)','t');

isim=quadl(fun,0,2*pi)

isim = 6.7992 + 3.1526i（2）

I11 x)2

ln(0

1 x

2

fun=inline('(log(1+x))./(1+x.^2)','x'); isim=quadl(fun,0,1) isim = 0.2722