1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!
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1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!1/3*4+1/4*5+1/5*6+
1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!
1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!
1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!
规律就是分子从4到100,分母等于3到99,1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=4/3+5/4+6/5+7/6+8/7+9/8+10/9.100/99=100.67737751764 亲,您的采纳是我的动力,
数学题(1/4+1/5+1/6+...+1/671)(1/3+1/4+1/5+..+1/670)-(1/3+1/4+1/5+...+1/671)(1/4+1/(1/4+1/5+1/6+...+1/671)(1/3+1/4+1/5+..+1/670)-(1/3+1/4+1/5+...+1/671)(1/4+1/5+1/6+...+1/670）=?
简算：1/1*2+1/2*3+1/3*4+1/4*5+1/5*6
巧算：(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=====
(-60)/(1/3-1/4+1/5-1/6) please
1/3*4+1/4*5+1/5*6+1/6*7+.1/99*100=?
2×3/1+3×4/1+4×5/1+5×6/1+.199×200/1=?
1/1*3+1/2*4+1/3*5+1/4*6+.+1/100*102=?
1+1+1+1+11+-1-1-1-1-2-3-4-5-6等于
1-1/2+1/3-1/4+1/5-1/6+1/7.-1/50=?
1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6 （简便方法）
[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)]
(1/4+1/5+1/6+...+1/671)(1/3+1/4+1/5+...+1/670)-(1/3+1/4+1/5+...+1/671)(1/4+1/5+1/6+...+1/670)=
1/1*2*3+1/2*3*4+1/3*4*5+1/4*5*6---------+1/48*49*50
1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少?
1/2{1/3[1/4(1/5x-1)-6]+4}=1
1.（1+1/2+1/3+1/4）*（1/2+1/3+1/4+1/5）-（1+1/2+1/3+1/4+1/5）*（1/2+1/3+1/4）=2.（1+1/2+1/3+1/4+1/5）*（1/2+1/3+1/4+1/5+1/6）-（1+1/2+1/3+1/4+1/5+1/6）*（1/2+1/3+1/4+1/5）=
1*1/2+1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6+1/6*1/7用简便方法怎么做?
矩阵特征值问题,怎样让矩阵的特征值变小1 3 3 3 5 5 7 7 7 9;1/3 1 2 3 4 4 5 5 6 8;1/3 1/2 1 2 4 5 6 5 7 7;1/3 1/3 1/3 1/2 4 5 6 7 8 7;1/5 1/4 1/4 1/4 1 3 5 5 6 7;1/5 1/4 1/5 1/5 1/3 1 3 3 1 5;1/7 1/5 1/6 1/6 1/5 1/3 1 1 3 7;1/7 1/5 1/5