5.求f(x)与g (x)的最大公因式:-|||-(1) (x)=(x)^4+(x)^3-3(x)^2-4x-1 (x)=(x)^3+(x)^2-x-1;-|||-(2) (x)=(x)^4-4(x)^3+1 , (x)=(x)^3-3(x)^2+1;-|||-(3) (x)=(x)^4-10(x)^2+1,-|||-(x)=(x)^4-4sqrt (2)(x)^3+6(x)^2+4sqrt (2)x+1.

5.求 f(x)与 g (x)的最大公因式:-|||-(1) (x)=(x)^4+(x)^3-3(x)^2-4x-1 (x)=(x)^3+(x)^2-x-1;-

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

函数(x)=(x)^3+(x)^2-x-1的单调递减区间为（ ）(x)=(x)^3+(x)^2-x-1(x)=(x)^3+(x)^2-x-1(x)=(x)

x .-m -1 O-|||--x m 1 =(a)_(4)(x)^4+(a)_(3)(x)^3+(a)_(2)(x)^2+(a)_(1)x+(a)_(0) ,

求u(x),v(x)，使u(x)f(x)+v(x)g(x)=(f(x),g(x))(1)f(x)=x^4+2x^3-x^2-4x-2，g(x)=x^4+x^3-

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

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

求二次型 ((x)_(1),(x)_(2),(x)_(3))=4({x)_(2)}^2-3({x)_(3)}^2+4(x)_(1)(x)_(2)-4(x)_(1

2.解方程组 ) (x)_(1)+(x)_(2)+(x)_(3) (x)_(1)+(x)_(2)-(x)_(3)-(x)_(4)=1 5(x)_(1)+5(

) (x)_(1)+4(x)_(2)-2(x)_(3)+8(x)_(4)=2 -(x)_(1)+2(x)_(2)+3(x)_(3)+4(x)_(4)=1 (x)