设多项式(x)=(x)^3+x+4，则矩阵(x)=(x)^3+x+4，则(x)=(x)^3+x+4________。(x)=(x)^3+x+4(x)=(x)^3+x+4(x)=(x)^3+x+4(x)=(x)^3+x+4

按(x-4 )的幂展开多项式(x)=(x)^4-5(x)^3+(x)^2-3x+4按$$(x-4 )$$的幂展开多项式

设_(1),(X)_(2),(X)_(3),(X)_(4)独立同分布，服从分布_(1),(X)_(2),(X)_(3),(X)_(4) ，记_(1),(X)_(

13.-|||-多项式 ((x)_(1),(x)_(2),(x)_(3))=(({x)_(1)+(x)_(2))}^2+(({x)_(1)+(x)_(3))}^

设_(1),(X)_(2),(X)_(3),(X)_(4)是取自总体_(1),(X)_(2),(X)_(3),(X)_(4)的样本,_(1),(X)_(2),(

(4) (x)=sqrt [3]({x)^4} , (x)=xcdot sqrt [3](x);

若多项式(x)=(x)^4+(x)^3-3(x)^2-4x-1 和 (x)=(x)^3+(x)^2-x-1，则f(x)和g(x)的公因式为（）。A、x+1B、x

设非齐次线性方程组 ) (x)_(1)+2(x)_(3)+(x)_(4)=2 (x)_(1)+(x)_(2)+(x)_(3)+4(x)_(4)=a (x)_(

关于方程组_(1)-2(x)_(2)+3(x)_(3)-4(x)_(4)=4 _(1)-2(x)_(2)+3(x)_(3)-4

设_(1),(X)_(2),(X)_(3),(X)_(4)相互独立且服从相同的分布，_(1),(X)_(2),(X)_(3),(X)_(4)，记_(1),(X)

用消元法解下列线性方程组:-|||- x1+3x2+5x3-4x4 =1, x1+3x2+2x3-2x4+x5=-1, x1-2x2+x3-x4-x5=3, x