[题目]设 =dfrac (1)({log )_(2)11}+dfrac (1)({log )_(3)11}+dfrac (1)({log )_(4)11}+dfrac (1)({log )_(5)11}-|||-则 ()-|||-A、 lt Plt 1-|||-B、 https:/img.zuoyebang.cc/zyb_1a408da1e843df66560efef935e93b6c.jpglt Plt 2-|||-C、 lt Plt 3-|||-D、 lt Plt 4

. . 0 1 3-|||-p .dfrac (1)(5) .dfrac (1)(6) dfrac (1)(5) .dfrac (1)(15) dfrac (1

. . 0 1 3-|||-p .dfrac (1)(5) .dfrac (1)(6) dfrac (1)(5) .dfrac (1)(15) dfrac (1

(5)下列函数的导数计算正确的有 () .-|||-① (arcsin x)=-dfrac (1)(sqrt {1-{x)^2}}; ② ((log )_(a)

[题目]-|||-计算:-|||-dfrac (1)(1times 2)+dfrac (2)(2times 4)+dfrac (3)(4times 7)+dfr

(B) dfrac (11)(32) . (C) dfrac (1)(2) . (D) dfrac (3)(8) .

4.设函数f(x)在(1)=dfrac (1)(2),11上连续，（0，1）内可导，f(0)=0(1)=dfrac (1)(2),11,证明存在一点(1)=df

计算下面各题。-|||-div dfrac (11)(8)=-|||-dfrac (2)(5)times dfrac (1)(2)=-|||-dfrac (3)

11设 9.ipg-|||-OA dfrac (5)(9)-|||-CB dfrac (1)(9)-|||-oc dfrac (4)(9)-|||-dfrac

dfrac (1)(2)x+dfrac (1)(3)=dfrac (1)(4)x-dfrac (1)(5)

[题目]设x的分布律为-|||--1012-|||-Pk dfrac (1)(8)dfrac (1)(4)dfrac (1)(2)dfrac (1)(8)-||