1000x4.68%x2=?急快算!

1000x4.68%x2=?急快算! 已知x2+x+1=0 求x4+1/x4 已知x2-x-1=0,求x4+1/x4 x2-3x+1=0 x2/(x4-x2+1) 若X2+1除以X=5,求X4+X2+1除以X4-X2+1 若X2+1除以X=5,求X4+X2+1除以X4-X2+1 分解因式：X4-4x2+3=? x1+x3+x4=7 x2+x3+x4=6 x2+x1+x4=8 x2+x1+x3=9 求x1 x2 x3 x4 是多少? x+1/x=2 求x2+1/x2 x4+1/x4 的值x2+1/x2 x4+1/x4 2和4是平方。 excel规划求解约束条件,该怎样输入目标函数：1000x1+1900x2+2700x3+3400x4约束条件：0.18x1+0.28x2+0.4x3+0.5x4=10%(x1+x2+x3+x4)x1>=20%(x1+x2+x3+x4)（50000x1+70000x2+130000x3+160000x4+2000x5）=0 已知x2/x4+1=1/3,求x4/x8+x4+1的值 lingo简单线性规划问题,老是提醒出错~model:max=0.043*x1+0.027*x2+0.025*x3+0.022*x4+0.045*x5;x1+x2+x3+x4+x5=1000;[ave] 2*x1+2*x2+x3+x4+5*x5 x+1/x=3,求x2/x4+x2+1 x2-5x+1=0,求x4+1/x2 用克拉默法则解下列方程组 x1-2x2+3x3-4x4=4 x2-x3+x4=-3 x1+3x2+2x4=1 -7x2+3x3+x4=3x1-2x2+3x3-4x4=4x2-x3+x4=-3 x1+3x2+2x4=1 -7x2+3x3+x4=3 已知x+1/x=3 求x2+1/x2和1/x4+x4 x2/x2+x+1=1/4,求x2/x4+x2+1的值如题 若X2-3X+1 求x+1/x和x2+1/x2以及x4+1/x4的值若X2-3X+1=0 求x+1/x和x2+1/x2以及x4+1/x4的值