已知1/2=1-1/2,1/6=1/2×3=1/2-1/3,1/12=7/3×4=1/3-1/4
4个回答
(1)1/5-1/6+1/6-1/7+1/7-1/8+1/9-1/9=4/45
(2)1/2+1/3-1/3-1/4+1/4+1/5-1/5+1/6+1/6+1/7=1/2+1/3+1/7
相关问题
已知1/2×3=1/2-1/3,计算:1+1/2×3+1/3×4+1/4×5+1/5×6
已知1^3=1=1/4×1^2×2^2;1^3+2^3=9=1/4×2^2×3^3;1^3… 计算
1/1×2=1-1/2 1/2×3=1/2-1/3 1/3×4=1/3-1/4...求1/2+1/6+1/12+1/20
已知:1/1×2=1-1/2,1/2×3=1/2-1/3.计算:1/1×2+1/2×3+1/3×4+···+1/99×1
有一系列等式:1×2×3×4+1=(12+3×1+1)2;2×3×4×5+1=(22+3×2+1)2;3×4×5×6+1
观察下列各式 1/6=1/2×3=1/2-1/3 1/12=1/3×4=1/3-1/4 1/20=1/4×5=1/4-1
已知1/1×2=1-1/2,1/2×3=1/2-1/3,1/3×4=1/3-1/4.,则1/x(x+1)+1/(x+1)
1/1×2=1-1//2,1/2×3=1/2-1/3,1/3×4=1/3-1/4,……
1/1×2=1-1/2,1/2×3=1/2-1/3,1/3×4=1/3-1/4,···
[1/1×2]=1-[1/2],[1/2×3]=[1/2]-[1/3],[1/3×4]=[1/3]-[1/4].