(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1/2003-1)(1-1/2004)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/22 07:33:26
(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1/2003-1)(1-1/2004)
99999乘2222-3333乘66666
99999乘2222-3333乘66666
(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1/2003-1)(1-1/2004)
=(1-1/2)(-1)(1-1/3)(1-1/4)(-1)(1-1/5)……(-1)(1-1/2003)(1-1/2004)
=(1-1/2)(1-1/3)(1-1/4)(1-1/5)……(1-1/49)(1-1/50) 因为2002个(-1)相乘为1
=(1/2)*(2/3)*(3/4)……*(2002/2003)*(2003/2004)
=1/2004
99999x2222-3333x66666
=11111x1111x3x3x2-11111x1111x3x3x2
=0
=(1-1/2)(-1)(1-1/3)(1-1/4)(-1)(1-1/5)……(-1)(1-1/2003)(1-1/2004)
=(1-1/2)(1-1/3)(1-1/4)(1-1/5)……(1-1/49)(1-1/50) 因为2002个(-1)相乘为1
=(1/2)*(2/3)*(3/4)……*(2002/2003)*(2003/2004)
=1/2004
99999x2222-3333x66666
=11111x1111x3x3x2-11111x1111x3x3x2
=0
(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1/2003-1)(1-1/2004)
(1-1/2-1/3-1/4-……-1/2003)(1/2+1/3+1/4+...+1/2004)-(1-1/2-1/3
计算:(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1-1/2010)(1/2011-1)
(1+3+5+……+2003)-(2+4+6+……+2004)=
1.动脑筋计算:(1+1/2)*(1+1/4)*(1+1/6)*…* (1+1/10)*(1-1/3)*(1-1/5)*
(1-1/2)*(1/3-1)*(1-1/4)*(1/5-1)…(1/2009-1)*(1-1/2010)等于多少
(1+1/2)*(1+1/3)*(1+1/4)*(1+1/5)* …… *(1+1/9) * (1+1/10)
1+1+2+…+2004+(-1)+(-2)+(-3)+…+(-2004)
(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)*…*(1-1/19)*(1-1/20)=
(1-1/2)*(1-1/3)*(1-1/4)*……*(1-1/100)
(1-1/2)*(1-1/3)*(1-1/4)*……*(1-1/9) 算式
计算题:(1-2004/2005)+(1-2003/2005)+(1-2002/2005)+……+(1-2/2005)+