真三国无双7猛将传战戈:1/2,5/6,7/12,9/20,?后一个是什么?为什么 ?谢谢
来源:百度文库 编辑:高考问答 时间:2024/05/13 15:44:37
后一个是11/30,
计算公式如下:分母为n^2+n
分子为n^2+n-(n-1)^2-|n-2|
故接下来的为分母为5^2+5=30
分子为:5^2+5-4^2-|5-2|=11
1/(2/3)/(3/4)/(4/5)/(5/6)/(6/7)/(7/8)
1 8 9 4 1 1/6的排列规律、0 3/2 2/3 5/4 4/5 7/6
71 1/6×6/7+61 1/5×5/6+51 1/4×4/5+41 1/3×3/4+31 1/2×3/2
1/2+1/3+1/4+1/5+1/6+1/7+.......+1/99+1/100=?
1/2+1/3+1/4+1/5+1/6+1/7+...+1/n
1/2+3/4+5/6+7/8+9/10+``````+99/100=?
1-1/2-1/3-1/4-1/5-1/6-1/7-1/8-......-1/17-1/18-1/19-1/20=?
9x+2/5[5/2(3x-4)+10=6/7[14(x+1)-28]
x^2/1!-x^4/3!+x^6/5!-x^8/7!+...+(-1)^(n+1)*x^2N/(2n+1)!
x^2/1!-x^4/3!+x^6/5!-x^8/7!+...+(-1)^(n+1)*x^2N/(2n+1)!的值