【分数】1/1x3+1/3x5+1/5x7+…+1/2009x2011要清楚过程的,乘用x代替,用简便方法计算
【分数】1/1x3+1/3x5+1/5x7+…+1/2009x2011要清楚过程的,乘用x代替,用简便方法计算
计算:1/1x3+1/3x5+1/5x7+...1/2009x2011+1/2011×2013
计算1/1X3+1/3x5十1/5X7+.+1/2009x2011
1/1x3+1/3x5+1/5x7+.+1/2009x2011=
1X3分之一+3X5分之一+5X7分之一+7X9分之一加到2009X2011分之一怎么算,
1/1x3+1/3x5+1/5x7+.+1/1997x1999 简便计算.
-13x3/2+3/1x(-13)-0.34x7/2-7/5x0.34用简便方法计算
解方程:2x/1x3+2x/3x5+……2x/2009x2011=2010
x8+x7+x6+x5+x4+x3+x2+x+1因式分解
经典奥数题11/1x3+1/3x5+1/5x7.1/99x101解题思路请写清楚
计算:1/1x3+1/3x5+1/5x7+1/7x9+……+1/2011x2013
sin(x)=x-x3/3!+x5/5!-x7/7!+……+(-1)nx2n+1/(2n+1)!+…… 编程并计算sin