(1-1/2)+ (1/3-1/4)+ (1/5-1/6)...+ (1/99-1/100)=?
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(1-1/2)+(1/3-1/4)+(1/5-1/6)...+(1/99-1/100)=?(1-1/2)+(1/3-1/4)+(1/5-1/6)...+(1/99-1/100)=?(1-1/2)+(1
(1-1/2)+ (1/3-1/4)+ (1/5-1/6)...+ (1/99-1/100)=?
(1-1/2)+ (1/3-1/4)+ (1/5-1/6)...+ (1/99-1/100)=?
(1-1/2)+ (1/3-1/4)+ (1/5-1/6)...+ (1/99-1/100)=?
这道题我做过.程序如下:
var s:real; i,j:integer;
begin
s:=0;
j:=1;
for i:=1 to 100 do
begin
s:=s+j/i;
j:=j*-1;
end;
writeln(s:0:3);
end.
输出结果为:
0.688
256分之255
(1-1/2)+ (1/3-1/4)+ (1/5-1/6)...+ (1/99-1/100)
这道题是典型的拆后计算。
200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
(1-2/1)*(1-3/1)*(1-4/1)*.*(1-2007/1)*(1-2008/1)
(1-1/2)(1-1/3)(1-1/4).(1-1/100)
(1+2/1)(1+4/1)(1+6/1).(1+10/)(1-3/1)(1—5/1).(1-9/1)
(-1/2)-(-1/3)-(+1/4)
1.(1+1/2+1/3+1/4)*(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4)=2.(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=
(-1×1/2)+(-1/2×1/3)+(-1/3×1/4)+…+(-1/2008×1/2009)
(-1*1/2)+(-1/2*1/3)+(-1/3*1/4).(-1/2012*1/2013)
-1/2+(-1/6)-(-1/4)-2/3
计算 ( 1+1/2)*(1-1/3)*(1+1/4)*(1-1/5)*.*(1+1/1000)*(1-1/1001)
(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)×(1/2+1/3+1/4)~
(1+1/2+1/3+1/4)乘以(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)乘以(1/2+1/3+1/4)简算
(1/2+1/3+1/4+1/6)*24
(1-1/2)×(1-1/3)×(1-1/4)……×(1-1/2008)计算方法
(1*2)/1+(2*3)/1+(3*4)/1+.+2010*2011/1
(-1×1/2)+(-1/2×1/3)+(-1/3×1/4)+...+(-1/2004×1/2005)
(1/2+1/3+1/4+1/5+1/6+.+1/2013)*(1+1/2+..+1/2012)-(1+1/2+1/3+1/4+...+1/2013)*(1/2+.+1/2012)(1/2+1/3+1/4+1/5+1/6+...+1/2013)*(1+1/2+1/3+1/4...+1/2012)-(1+1/2+1/3+1/4+...+1/2013)*(1/2+1/3+1/4+...+1/2012)
计算:(1/50-1)(1/49-1)(1/48-1)…(1/4-1)(1/3-1)(1/2-1)