1000x4.68%x2=?急快算!
1000x4.68%x2=?急快算!
已知x2+x+1=0 求x4+1/x4
若X2+1除以X=5,求X4+X2+1除以X4-X2+1
min= X1+X2+X3+X4+X5
X1+2X2-X3+X4=1
x1+x3+x4=7 x2+x3+x4=6 x2+x1+x4=8 x2+x1+x3=9 求x1 x2 x3 x4 是多少
lingo软件求教max=1/2*x1*x2*@sin(x4)+1/2*x2*x3*@sin(120-x4);x4>0;
X1,X2,X3,X4,X5.5个未知数个在0-999这1000个整数中随机取值,求X1+X2+X3+X4+X5>=30
分解因式:(x4+x2-4)(x4+x2+3)+10=______.
奇次线性方程组x1-2x2+3x3-4x4=0 x2-x3+x4=0 x1+3x2-kx4=0 -7x2+kx3+x4=
求线性方程组 x2-x3-x4=0 x1+x2-x3+3x4=1 x1-x2+x3+5x4=-1 x1+2x2-2x3+
已知正整数x1 、 x2 、x3 、 x4 、 x5、,且x1 + x2 + x3+ x4 + x5= x1 x2 x3