dfrac (1)(6)-|||-C. dfrac (1)(2) D. dfrac (1)(3)
dfrac (1)(6)-|||-C. dfrac (1)(2) D. dfrac (1)(3)
dfrac (1)(12)-|||-(B) dfrac (1)(2) .-|||-C dfrac (1)(8)-|||-) dfrac (1)(6)
0 .dfrac (1)(2) .-|||--dfrac (1)(2) . .dfrac (1)(8) .dfrac (1)(6) .dfrac (1)(24)
(B) =2, =dfrac (1)(3).-|||-(C) =1, =dfrac (1)(2). (D) =1, =-dfrac (1)(3),求指导本题解题
)-|||-则 cot (XY)=() 。-|||-A .-dfrac (1)(18) .-|||-B .dfrac (1)(18)-|||-C .dfrac
10、单选-|||-极限 lim _-|||-A-|||-dfrac (1)(6)-|||-B dfrac (1)(2)-|||-C -dfrac (1)(3)
(B) dfrac (1)(2)(X)_(1)+dfrac (1)(2)(X)_(2)-|||-(C) dfrac (1)(2)(X)_(1)+dfrac (1
dfrac (1)(7)-|||-C dfrac (1)(15)-|||-D dfrac (1)(3)
_(1)-(F)_(2)-|||-C. dfrac (2)(3)(F)_(1)+dfrac (1)(3)(F)_(2)-|||-D. dfrac (2)(3)(