4/5x1/3+4/5、1/4x5-1/4,4/7+4/7x6,用简便方法计算
1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101
足彩4x1 4x4 4x5 4x6
提问:1x1/2+1/2x1/3+1/3x1/4+1/4x1/5+1/5x1/6+1/6x1/7 用简便方法
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.
求编程高手.求x1+2*x2+3*x3+4*x4+5*x5+9*x6的最小值
1x2分之2010+2x3分之2010+3x4分之2010+4x5分之2010+5x6分之2010简便运算
1x5+2x5+3x5+4x5+5x5… 麻烦给我一个公式.
1x2+2x4+3x6+4x8+5x10+.+20x40 简便计算
用秦九韶算法计算当X=3时多项式f(x)=7X7+6x6+5x5+4x4+3X3+2x2+X的值
用简便方法计算下列各题(1)2^5x5^4 (3)8^8x(-四分之一)^12 (4)(-3)^5x(-三分之二)^5x
1/1X2+1/2X3+1/3X4+1/4X5+1/5X6……1/2007X2008
1x2/1+2x3/1+3x4/1+4x5/1+5x6/1+6x7/1