:þַжֵ()

ʽ:
IntergalMultiple2(f,n,x1,a1,b1,x2,a2,b2,,xn,an,bn)
IntergalMultiple2(f,n,x1,a1,b1)

f:ű,洢ֱʽ
n:Ŀ
x1:ֱ
a1:x1ӦĻ,ΪΪ
b1:x1ӦĻ,ΪΪ

xn:nֱ
an:xnӦĻ,ΪΪ
bn:xnӦĻ,ΪΪ

˵:

1άȽϵ͵ĺ,м,дĿΪ˸ӿάȽϴĺ⡣

2㷨һؿ㷨ؿ㷨,ʱļһȽϺ,ȻϺ,Ǿֱӽnȷ,Ȼٴ⼴ɡ⵱ʡȥһĹ̡

ԭ:

1x1[a1,b1]֮n,ÿһݼΪx1[i];ͬx2x3,,xnڶӦn

2z=(b1-a1)*(b2-a2)**(bn-an)

3s=f(x1[i],x2[i],,xn[i]),i=1,2,,n

4ֽΪ I=z*s/n


:

//Աʽ f(x,y,z)=x*y*z ıx[0,1];y[2.5,3];z[1.4,3.1]ڽж

f="x*y*z";f0=IntergalMultiple2(f,300,x,0,1,y,2.5,3,z,1.4,3.1)//سõ½
f0 =
[ 3.07356458333327 ]