C语言求和题.doc

,n(n=20)1*2,2*3,3*4,4*5,n*(n+1),#include#includevoid main()int n=1;float s=0;while(n=20)s+=n*(n+1);n+;printf(%.fn,s);3080,n(n=22)2*3,4*5,2n*(2n+1),#include#includevoid main()int n=1;double s=0;while(n=22)s+=(2*n)*(2*n+1);n+;printf(%.fn,s);15686,n(n=23)1*2,3*4,5*6,(2n-1)*(2n),#include#includevoid main()int n=1;double s=0;while(n=23)s+=(2*n-1)*(2*n);n+;printf(%.lfn,s);16744,n(n=20)1*2*3,2*3*4,3*4*5,n(n+1)(n+2),#include#includevoid main()int n=1;double s=0;while(n=20)s=s+n*(n+1)*(n+2);n+;printf(%.lfn,s);53130,201*2*3,3*4*5,5*6*7,(2n-1)*2n*(2n+1),#include#includevoid main()int n=1;double s=0;while(n=20)s+=(2*n-1)*(2*n)*(2*n+1);n+;printf(%.lfn,s);352380,n(n=22)2*3*4,4*5*6,2n*(2n+1)*(2n+2),#include#includevoid main()int n=1;double s=0;while(n=22)s+=(2*n)*(2*n+1)*(2*n+2);n+;printf(%.lfn,s);558624,n(n=23)1*2*3,3*4*5,(2n-1)*2n*(2n+1),#include#includevoid main()int n=1;double s=0;while(n=23)s+=(2*n-1)*(2*n)*(2*n+1);n+;printf(%.lfn,s);608856,n(n=20)31/(1*2),1/(2*3),1/(3*4),1/(n*(n+1),0.952,n(n=20)31/(2*3),1/(4*5),1/(2n*(2n+1),0.295,10009900372310588,1000990037330278.015(double) 30278.020(float)#include#includevoid main()int i=1000;floatn,y,s=0;while(i=9900)if(i%3=0)&(i%7=0)s+=sqrt(i);i+;printf(%.3fn,s);,2000900035734812.515,10005000313#include#includevoid main()int i=1000;floats=0;while(i0.235S31/(1*2*3),1/(2*3*4),1/(3*4*5),1/(n*(n+1)*(n+2),#include#includevoid main()int n=1;doubles=0;while(s=0.235)s=s+1.0/(n*(n+1)*(n+2);n+;printf(%.3lfn,s);0.238,n(n=20)31/(2*3*4),1/(4*5*6),1/(2n(2n+1)(2n+2),0.057,n(n=20)31/(1*2*3),1/(3*4*5),1/(2n-1)(2n)(2n+1),0.193,n(n=8)31/1!,1/2!,1/3!,1/4!,1/n!,(,! )1.718,S,(1/n!)0.001s,31/1!,1/2!,1/3!,1/n!,(,! )1.718,n(n=50)1*2,-2*3,3*4,-4*5,(-1)(n-1)*n*(n+1), (, )-1300,50001*2,-2*3,3*4,-4*5,(-1)(n-1)*n*(n+1),(, )5202,7-100(1-2-3),(4-5-6),(7-8-9), ,(3n+1)-(3n+2)-(3n+3), (,n=0,1,2,3)-175n,5001*2*3,-2*3*4,3*4*5,-4*5*6,(-1)(n-1)*n*(n+1)*(n+2),(, )570,2031,1/(3*3),1/(5*5),1/(7*7),1/(2n-1)*(2n-1),1.221,2031,-1/(2*2),1/(3*3),-1/(4*4),(-1)(n-1)/(n*n),(, )0.821,2031,-1/33,1/53,1/73,(-1)(n-1)/(2n-1)3,(, )0.969,2031,1/24,1/34,1/44,1/n4,(, )1.082,2031,-1/24,1/34,-1/44,(-1)(n-1)/n4,(, )0.947,20,31/2,2/3,3/4,4/5,5/6,6/7,7/8, , n/(n+1),17.355,20,32/1,3/2,4/3,5/4,6/5,7/6,8/7, ,(n+1)/n,23.598,20,31/3,3/5,5/7,7/9,9/11,11/13,13/15,(2n-1)/(2n+1)16.992,20,33/1,5/3,7/5,9/7,11/9,13/11,15/13,(2n+1)/(2n-1)24.959,20,32/3,4/5,6/7,8/9,10/11,12/13,14/15,(2n)/(2n+1)18.496,20,33/2,5/4,7/6,9/8,11/10,13/12,15/14,(2n+1)/(2n)21.799,20(1-2-3),(4-5-6),(7-8-9), ,(3n+1)-(3n+2)-(3n+3), (,n=0,1,2,3)-650,n(n=20,x=0.5),3sin(x)/x,sin(2x)/2x,sin(3x)/3x, ,sin(n*x)/(n*x) ,(,sin(x)2.786,n(n=20,x=0.5),3cos(x)/x,cos(2x)/2x,cos(3x)/3x, ,cos(n*x)/(n*x), (,cos(x)1.277,n(n=20,x=0.4),3sin(x)/2,sin(2x)/4,sin(3x)/6,sin(n*x)/2n, (,sin(x)0.699,n(n=20,x=0.4),3cos(x)/2,cos(2x)/4,cos(3x)/6,cos(n*x)/2n,(,cos(x)0.520,20,31,-1/3,1/5,-1/7,1/9,(-1) (n-1)/(2*n-1) (, )0.773,(-1) (n-1)/(2*n-1),)0.001,31,-1/3,1/5,-1/7,1/9,(-1)(n-1)/(2*n-1) (, )0.785,5,31,1/2,1/3,1/4,1/n 5.002,71*3,3*5,5*7,(2*n-1)*(2*n+1) (,n=1,2,3)553,71*3,-3*5,5*7,-7*9,(-1)(n+1