(0,1) , =2s-1,则(0,1) , =2s-1,( )。A.(0,1) , =2s-1,B.(0,1) , =2s-1,C.(0,1) , =2s-1,D.(0,1) , =2s-1,

xi sim N(0,1) , =2s-1,则xi sim N(0,1) , =2s-1,( )。A.xi sim N(0,1) , =2s-1,B.xi

(B.)(0,1). (C.)(1,2). (D.)(2,+∞).2.函数$f(x)=\frac{|x|\sin(x-2)}{x(x-1)(x-2)^{2}

(A.)(-1,0) (B.)(0,1) (C.)(1,2) (D.)(2,3)【例38】函数$f(x)=\frac{|x|\sin(x-2)}{x(x-

》[真题6](2018)函数 =arcsin (1-x)+dfrac (1)(2)lg dfrac (1+x)(1-x) 的定义域是 __-|||-A.(0,1

[真题6](2018)函数 =arcsin (1-x)+dfrac (1)(2)lg dfrac (1+x)(1-x) 的定义域是 __-|||-A.(0,1)

(-2,1)-|||-C.(0,1) D. (-infty ,-2) x (1,+infty )

随机变量X,Y相互独立且sim N(0,1),sim N(0,1),则下列各式成立的是( )A.sim N(0,1)B.sim N(0,1)C.sim N

[单选题]0，1/2 ,0, 1/8 ,0, 1/32 ,0,( )A． 1/120 B. 1/122 C. 1/124 D. 1/128

39.设f(x)在[0,1]上连续,在(0,1)内可导,且 f(0)=0 ,(dfrac (1)(2))=2, (1)=dfrac (1)(2),-|||-(1

若_(i)sim N(0,1), =1,2,(X)_(1),(X)_(2)独立，则_(i)sim N(0,1), =1,2,(X)_(1),(X)_(2)()A