计算(1+1/3)×(1+1/8)×(1+1/15)×……×(1+1/99)=_____.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/30 17:59:56
计算(1+1/3)×(1+1/8)×(1+1/15)×……×(1+1/99)=_____.
利用以下等式
1+1/(n²-1)
=n²/(n²-1)
=n²/[(n-1)(n+1)]
=n/(n-1)*n/(n+1)
(1+1/3)×(1+1/8)×(1+1/15)×……×(1+1/99)
=(2/1)×(2/3)×(3/2)×(3/4)×(4/3)*(4/5)×.×(10/9)×(10/11)
=2×(10/11)
=20/11
1+1/(n²-1)
=n²/(n²-1)
=n²/[(n-1)(n+1)]
=n/(n-1)*n/(n+1)
(1+1/3)×(1+1/8)×(1+1/15)×……×(1+1/99)
=(2/1)×(2/3)×(3/2)×(3/4)×(4/3)*(4/5)×.×(10/9)×(10/11)
=2×(10/11)
=20/11
完成英语句子1 _____ _____ _____ _____ _____(将有)a railway station i
请不要乱做.一.计算.4878493除以756757=_____(1)4645.54除以453.764=_____ (2
计算(3x-2)(1-2x)(-5x)=_____
一元二次方程解法有(1)_____(2)_____(3)_____(4)_____(5)_____
计算:(-8分之7)+8分之5=_____.计算:(-8分之7)+(-8分之5)=______.计算:-2.6+5分之1
1、Get up ,please .(改同义句) _____ _____ _____ _____,please.
计算:1-2+3-4.+99-100=_____.
1、keep healthy=_____ _____ _____ _____
用带有(-)的计算器计算,-8x2+6÷(-3)-1的按键顺序是_____
计算下列各题1、 _____ ________ __________ _____________(1)√11-2 (2)
计算锐角三角函数(1)sin^2 30度+cos^2 30度=____+_____=_____(2)sin^2 45度+
计算:11/12-(5/12-1/7)=_____