7/25x3/16+22/25x7/16=巧算?
SIN(X)=X-X3/3!+X5/5!-X7/7!+.X3代表3次方,/代表除法 用C编程啊,
简便计算:1.25x0.25x3.2 200.2x7.8-7.8x0.2
1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=?
2/1x3+2/3X5+2/5x7=2/7x9+2/9x11
我有这样的一组数 X1=1 X2=3 X3=7 X4=14 X5=25 X6=41 X7=63 X8=92 X9=129
囗x7+16x囗=322 28x囗-囗x16=7.2 (囗+1.2x囗)x3=264 3.5x(囗
已知求sin(x)的近似值的多项式公式为:sin(x)=x-x3/3!+x5/5!-x7/7!+
已知1-1/3=2/1x3,计算1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=
已知有一列数x1,x2,x3,...,x7,且x1=8,x7=5832,x1/x2=x2/x3=x3/x4=x4/x5=
设x1~x7是自然数,且x1<x2<...<x7,x1+x2=x3,x2+x3=x4,x3+x4=x5,x4+x5=x6
设x1,x2…x7为正整数,且x1<x2…<x7,且x1+x2...+x7=159,求x1+x2+x3的最大值
已知x1+x2+x3+x4+x5+x6+x7=2010,且x1+x2=x3,x2+x3=x4,x3+x4=x5,x5+x