1/6×1/12×1/20×1/30×1/42怎么简便运算
6个回答
展开全部
1/6×1/12×1/20×1/30×1/42简便运算如下:
釆用裂项求和法简算:
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
釆用裂项求和法简算:
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
1/6×1/12×1/20×1/30×1/42怎么简便运算
釆用裂项求和法简算:
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
釆用裂项求和法简算:
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
釆用裂项求和法简算:
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
釆用裂项求和法简算:
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
1/6+1/12+1/20+1/30+1/42
=1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
展开全部
釆用裂项求和法简算: 1/6+1/12+1/20+1/30+1/42 =1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=1/2-1/7
=5/14
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询