1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132
=1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+……+1/11-1/12
=1/4-1/12
=3/12-1/12
=2/12
=1/6
1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132=?
1/20+1/30+1/42+1/56+1/72+1/90+1/110+1/132=?
能不能简便运算?
能不能简便运算?
数学人气:276 ℃时间:2019-09-21 06:10:35
优质解答
我来回答
类似推荐
猜你喜欢
- 1电能转化为磁能,电能有损耗吗,是否遵循能量守恒定律
- 2Although lucy was ————(prepare),she did quite well in the exam
- 31秒差距=?光年=?天文单位=?千米
- 4This is the house()he lived last year
- 5Is lucy or lily the ---of the twins?Lucy,she was born half an hour earlier
- 6在容积为5L的密闭容器中,通入5mol氮气和8mol氢气,在一定条件下反应生成氨气,当反应进行到2分钟时,测得容器内有4摩尔氨气,则2分钟时,容器内气体的总物质的量与反应前容器内气体的总物质的量之比为
- 7明明在计算一道题时,把除数65看成了56,结果计算出商是13,余数是52,正确的商应该是多少?
- 8一个无盖的正方体木箱,箱长12dm,做这样一个水箱,需要铁皮多少平方分米?它的容积是多少升?
- 9已知F(X)=X3-AX2+3X,若函数F(X)在区间【1,正无穷大)上是增函数,求A
- 10英汉互译 如果你来,我将给你一个苹果.