(B) gt 0 ,gt 0 . (C) a-b=1 . (D) gt 0 ,lt 0 .

(B) gt 0.-|||-(C) lt 0. (D) neq 0.

图-175 设事件A、B相互独立, (A)gt 0, (B)gt 0, 则 ()-|||-A、 =phi B、 (A-B)=P(A)cdot P(overli

[题目]设 gt bgt 0, 证明: dfrac (a-b)(a)lt ln dfrac (a)(b)lt dfrac (a-b)(b).

[题目]设 gt bgt 0 ,证明: dfrac (a-b)(a)lt ln dfrac (a)(b)lt dfrac (a-b)(b)

[题目]设 gt bgt 0 ,证明: dfrac (a-b)(a)lt ln dfrac (a)(b)lt dfrac (a-b)(b)

设 gt bgt 0 ,n>1, 证明:-|||-nb^(n-1)(a-b)

11.设 gt bgt 0, 证明:-|||-dfrac (a-b)(a)lt ln dfrac (a)(b)lt dfrac (a-b)(b)

(α>0,β>0).若f`(x)在 x=0 处连续,则-|||-(A) alpha -beta gt 1. (B) lt alpha -beta leqslan

) 且 gt 0,-|||-则λ为 ()-|||-(A) lambda gt 0 的任意实数 (B) lambda =b+1 (C) lambda =dfrac

(B)a<4,b>0.(C)a>4,b<0. (D)a<4,b<0.(2025,2)设矩阵 $\begin{bmatrix}1&2&0\\2&a&0\\0&0