1+(-3)+(-5)+7+9+(-11)+(-13)+15+···+2009+(-2011)+(-2013)+2015 =
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 18:10:03
![1+(-3)+(-5)+7+9+(-11)+(-13)+15+···+2009+(-2011)+(-2013)+2015 =](/uploads/image/z/8369-17-9.jpg?t=1%2B%28-3%29%2B%28-5%29%2B7%2B9%2B%EF%BC%88-11%EF%BC%89%2B%EF%BC%88-13%EF%BC%89%2B15%2B%C2%B7%C2%B7%C2%B7%2B2009%2B%EF%BC%88-2011%EF%BC%89%2B%EF%BC%88-2013%EF%BC%89%2B2015+%3D)
1+(-3)+(-5)+7+9+(-11)+(-13)+15+···+2009+(-2011)+(-2013)+2015 =
1+(-3)+(-5)+7+9+(-11)+(-13)+15+···+2009+(-2011)+(-2013)+2015 =
1+(-3)+(-5)+7+9+(-11)+(-13)+15+···+2009+(-2011)+(-2013)+2015 =
1+(-3)+(-5)+7+9+(-11)+(-13)+15+···+2009+(-2011)+(-2013)+2015
=【1+(-3)+(-5)+7】+【9+(-11)+(-13)+15】+···+【2009+(-2011)+(-2013)+2015】
=0+0+……+0
=0
1+3+5+7+9+11+.+99
1-3+5-7+9-11+13
1-3+5-7+9-11+.求救
1+3+5+7+9+11=?
1,3,5,7,9,11,15
计算:1-3 5-7 9-11
计算:1/3*5+1/5*7+1/7*9+1/9*11+1/11*13
计算:2/3*5+1/5*7+1/7*9+1/9*11+1/11*13
5 7 -5 3 9 -1 11 -3 1
简算:1/1*3+1/3*5+1/5*7+1/7*9+1/9*11
(1*3)/1+(3*5)/1+(5*7)/1+(7*9)/1+(9*11)/1
1/1*3+1/3*5+1/5*7+1/7*9+1/9*11
(1*3)/1+(3*5)/1+(5*7)/1+(7*9)/1+(9*11)/1
1,3,3,5,5,7,7,9,9,11,11 写出通项公式
巧算:(11-11/36)+(9-11/36*5)+(7-11/36*3)+(5-11/36*9)+(3-11/36*7)+(1-11/36*11)
(11-11/36)+(9-11/36*5)-(1-11/36*3)+(5-11/36*9)+(3-11/36*7)+(7-11/36*11)
1/1*3*5+1/3*5*7+1/5*7*9+1/7*9*11+1/9*11*13+1/11*13*15怎么计算
1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+1/(7*9*11)+1/(9*11*13)+1/(11*13*15)等于多少