2x2+4x4+6x6+.20x20怎么简便计算
2x2+4x4+6x6+.20x20怎么简便计算
(2X2)/1X3+(4X4)/(3X5)+(6X6)/(5X7)+...+(20X20)/(19X21)==?
1x2+2x4+3x6+4x8+5x10+.+20x40 简便计算
1x2+2x4+3x6+4x8+5x10+.+20x40 怎么算?
1x2+2x4+3x6+4x8 ------------------------------- 2x3+4x6+6x9+
(1x2+2x4+3x6+4x8)/(2x3+4x6+6x9+8x12)
计算①1x2/1+2x3/1+3x4/1+```+19x20/1= ②1x4/1+4x7/1+7x10/1+```+91
12.5x0.38+1.25x4.2+0.125x20如何用简便方法计算
1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101
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
编写程序:输入x的值,按照下列公式计算cos(x) cos(x)=1-x2/2!+ x4/4!- x6/6!+...精确
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.