9.当x→0时, (x)=a(x)^3+bx 与 (x)=(int )_(0)^sin x((e)^(t^2)-1)dt 是等价无穷小,则 ()-|||-(A) =dfrac (1)(3) =1 (B) =3, b=0 (C) =dfrac (1)(3) =0 (D) =1, b=0 A

当x→0时 (x)=x-sin ax 与 (x)=(x)^2ln (1-bx) 是等价无穷小,-|||-则 ()-|||-(A) =1, =-dfrac (1)

[题目]当 arrow 0 时, (x)=x-sin ax 与 (x)=(x)^2ln (1-bx)-|||-等价无穷小,则 ()-|||-

(3)设当x→0时, ^x-(a(x)^2+bx+1) 是比 x^2 高阶的无穷小,则 ()-|||-(A) =dfrac (1)(2) ,b=1 (B) a=

(1)当x→0时，f(x)=sin(ax^3)与g(x)=x^2ln(1-x)是等价无穷小量，则( ).A. a=1B. a=2C. a=-1D. a=-2

1.单选题(1)当x→0时，f(x)=sin ax^3与g(x)=x^2ln(1-x)是等价无穷小，则（）A. a=1B. a=2C. a=-1D. a=-2

例1.6 当x→0时, ((3+2tan x))^x-(3)^x 是 (sin )^2x+(x)^3cos dfrac (1)(x) 的 () .-|||-(A

[单选题]当x→0时，f（x）=x-sinax与g（x）=x2ln(1-bx)是等价无穷小，则（　　）.A.B.C.D.

[单选题]当x→0时，f（x）=x-sinax与g（x）=x2ln(1-bx)是等价无穷小，则（　　）.A.B.C.D.

[单选题]当x→0时，f（x）=x-sinax与g（x）=x2ln(1-bx)是等价无穷小，则（　　）.A.B.C.D.

1.当x→∞时，sin^2(1)/(x)与(1)/(x^k)为等价无穷小，则k=1.当x→∞时，$\sin^{2}\frac{1}{x}$与$\frac{1}{