请在以下答案中选出((-16))^dfrac (1{4)}的根A((-16))^dfrac (1{4)}B ((-16))^dfrac (1{4)}C((-16
(D) (hat {mu )}_(4)=dfrac (1)(3)(X)_(1)+dfrac (3)(4)(X)_(2)-dfrac (1)(12)(X)_(3)
((y+dfrac {1)(2))}^2=dfrac (3)(4) D. ((y-dfrac {1)(2))}^2=dfrac (3)(4)
19、单选 lim _-|||-A 1-|||-B) dfrac (4)(9)-|||-C dfrac (2)(3)-|||-D dfrac (9)(4)
lim _(xarrow 4)dfrac (sqrt {1+2x)-3}(x-4)= (-|||-A dfrac (2)(3) .-|||-B 2-|||-C
A dfrac (4)(5);B dfrac (4)(5);C dfrac (4)(5);D dfrac (4)(5).某学生依次进行三门课程的考试,第一门课程
B. dfrac {1)(2) . C. dfrac (2)(3) . D. dfrac (3)(4)
dfrac (1)(2)pi .-|||-C.π-|||-D. dfrac (5)(4)pi .-|||-0
dfrac (4)(3) D. -dfrac (4)(3)
(C) 3/4 (D) dfrac (1)(2)A、AB、BC、CD、DA、AB、BC、CD、D