3.已知 (x)=(x)^2-2x+3 , (x)=3(x)^2-x+1, 求下列-|||-(1) (x)+2g(x);-|||-(2) (x)-g(x);-|||-(3)f(x)·g(x );-|||-(4) dfrac (2f(x))(3g(x))

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-

(B) (int )_({x)_(1)}^(x_{3)}pi [ (f)^2(x)-(g)^2(x)] dx.-|||-(C)(int )_(x)^(x_{3)

3.已知方程组 ) (x)_(1)+(x)_(2)+2(x)_(3)=a 3(x)_(1)-(x)_(2)-6(x)_(3)=a+2 (x)_(1)+4(x

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;-

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;-||

1.已知方程组 ) (x)_(1)+(x)_(2)+(x)_(3)+(x)_(4)=2 3(x)_(1)+2(x)_(2)+(x)_(3)+(x)_(4)=a

已知(x+dfrac (1)(x))=(x)^2+dfrac (1)({x)^2}-3，求f(x)已知，求f(x)

当x→0时，f(x)=e^-x^(2+2x^3)-1与g(x)=x^2比较是（）A. f(x)是g(x)高阶的无穷小量B. f(x)是g(x)低阶的无穷小量C.

[试题]设f(x)=3x,g(x)=x2，则函数g[f(x)]-f[g(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