(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)一定要是简便运算!
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(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)一定要是简便运算!(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)一定要是简便运算!
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)
一定要是简便运算!
(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)一定要是简便运算!
可直接通分计算,上面的公分母化成30,下面化成60.
一分钟就出来了:
原式可变型为
(30/30+10/30+6/30+3/30+2/30+1/30)÷(30/60+15/60+10/60+5/60+3/60+1/60)
=(52/30)/(64/60)
=13/8
分子分母同时乘以60就可以了
13/8
同乘以60就可以了
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)
2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1
(1/2+1/4+1/6+1/10+1/12+1/60)/(1+1/3+1/5+1/10+1/15+1/30)
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)(用简算)
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=?简便计算方法
(1+1/3+1/5+1/10+1/15+1/30)/(1/2+1/4+1/6+1/12+1/20+1/60)=?简算
输出以下杨辉三角形.1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1 1 7 21 35 35 21 7
编程,打印杨辉三角(要求七行) 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1
1/2*1/15+1/3*1/2 6-(3/4-2/5) 1/6+1/5+1/2 4/5+11/15+3/10
谁会用MATLAB计算 权向量矩阵是A=[1,1/2,3,1,6,8,9,1/2 2,1,5,2,10,15,16,1 1/3,1/5,1,1/3,3,2,3,1/5 1,1/2,3,1,5,7,8,1/2 1/6,1/10,1/3,1/5,1,1,1,1/11 1/8,1/15,1/2,1/7,1,1,1,1/15 1/9,1/16,1/3,1/8,1,4/5,1,1/17 2,1,5,2,11,15,17,1];求权向量就是
1/3+1/6+1/10+1/15+1/(1+2+3+4+5+...n)=?找规律
1/3+1/6+1/10+1/5+.+1/5050
1/3+1/6+1/10+1/5+.+1/5050
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28+1/30)怎么算
(1/2-1/3) (1/4-1/5) (1/7-1/10) (1/14-1/15) (1/28 1/30)怎么算
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30))简算.
(1/2-1/3)+(1/4-1/5)+(1/7-1/10)+(1/14-1/15)+(1/28-1/30)要求简便运算.
6(1-1/3y)-1/5(10-15y)=1