1/2*3*4+1/3*4*5+1/4*5*6……+1/19*20*21+1/20*21*22=很简单的‘‘关于分数‘‘真是麻烦啊‘‘
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![1/2*3*4+1/3*4*5+1/4*5*6……+1/19*20*21+1/20*21*22=很简单的‘‘关于分数‘‘真是麻烦啊‘‘](/uploads/image/z/15226529-41-9.jpg?t=1%2F2%2A3%2A4%2B1%2F3%2A4%2A5%2B1%2F4%2A5%2A6%E2%80%A6%E2%80%A6%2B1%2F19%2A20%2A21%2B1%2F20%2A21%2A22%3D%E5%BE%88%E7%AE%80%E5%8D%95%E7%9A%84%E2%80%98%E2%80%98%E5%85%B3%E4%BA%8E%E5%88%86%E6%95%B0%E2%80%98%E2%80%98%E7%9C%9F%E6%98%AF%E9%BA%BB%E7%83%A6%E5%95%8A%E2%80%98%E2%80%98)
1/2*3*4+1/3*4*5+1/4*5*6……+1/19*20*21+1/20*21*22=很简单的‘‘关于分数‘‘真是麻烦啊‘‘
1/2*3*4+1/3*4*5+1/4*5*6……+1/19*20*21+1/20*21*22=
很简单的‘‘关于分数‘‘真是麻烦啊‘‘
1/2*3*4+1/3*4*5+1/4*5*6……+1/19*20*21+1/20*21*22=很简单的‘‘关于分数‘‘真是麻烦啊‘‘
确实很简单
1/2-1/3-1/4+1/3.-1/22=5/11
4、5、1、2、3、4、5
[2^4+1/4)(4^4+1/4)(6^4+1/4)(8^4+1/4)(10^4+1/4)】/[1^4+1/4)(3^4+1/4)(5^4+1/4)(7^4+1/4)(9^4+1/4)]
(1+1/2+1/3+1/4+1/5)*(1/3+1/4+1)-(1+1/3+1/4)*(1/2+1/3+1/4+1/5)
1+1 2+2 3+3 4+4 5+5
1,2,3,4,5
1,2,3,4,5,
1 2 3 4 5
1,2,3,4,5
1,2,3,4,5,
1 2 3 4 5
1,2,3,4,5,
.1,2,3,4,5,
1,2,3,4,5,
1,2,3,4,5,
1 2 3 4 5
1、2、3、4、5
1,2,3,4,5,
3,4,5,1,2