-dfrac (2)({x)^2} .-|||-C 2x+3 ;-|||-D /fujian/20260427/zyb_c1dbf8c08bc60f33da6ea5a3d9039b64.jpg-dfrac (2)({x)^2}

已知 f(x)= (B) dfrac {3)(2) (C)2 (D) dfrac (1)(2)

(B) =-dfrac (x)(2)+dfrac (3)(2)-|||-(C) =dfrac (x)(2)+dfrac (3)(2) (D) =-dfrac (

(B) (2-x). (C)f^2(x). (D)f(x^2).A、AB、BC、CD、DA、AB、BC、CD、D

dfrac (1)(x) C. -dfrac (1)({x)^2} D. dfrac (2)({x)^3}

6.总体X的概率分布为-|||-x 0 1 2 3-|||-P θ^2 (1-0) θ^2 /fujian/20260427/zyb_d23f4d

lim _(xarrow 4)dfrac (sqrt {1+2x)-3}(x-4)= (-|||-A dfrac (2)(3) .-|||-B 2-|||-C

lim _(xarrow infty )dfrac (6{x)^2+2}({x)^2}=A.6B.2C.3D.0A.6B.2C.3D.0

(B) dfrac (pi )(3) (C) π/6, (D) dfrac (pi )(2)A、AB、BC、CD、DA、AB、BC、CD、D

(2)若f(x)有连续的导数,则 int f(3x)dx= () .-|||-(A) f(x)+C (B) f(3x)+C-|||-(C) 3f(3x)+C (

∫(x+1)/(x+2)dx=() ()-|||-A 0-|||-B 1-|||-C 2-|||-D /fujian/20260427/zyb_b