两个重要极限 1.lim sin24x 0x2 1 B.16 CC.4 1 C D. x 2.93sin52x C B. 8 1 Cc C D.6 24 1 3.lim xtan C B.1 2 c.2 0D.0 4.m1-马2= C A.e-1 C B.e2 c.e-2 C D.e 1 lim(1-2x)* 5.x-0 C Ae- ce-2 C D.e
两个重要极限 1. =_________________ ． A. B. C. D. 4 1 2． =__________________． A. B. C. D. 6 1 3． =__________________． A. B. C. 2 D. 4． =_________________． A. 1 e B. 2 e C. 2 e D. e 5． x x x 1 0 lim(1 2 ) =_____________． A. 1 e B. 2 e C. 2 e D. e
l.B.解lim sin2 4x=lim 0x2 sin4x sin 4x.42 =16. x0 4x4x x3 1 2.C.解1im。 =m}(2x.1-1 3sin3 2x3sin 2x 8 24 1 1 tan sin- 王m子产= 1 3.B.解 x.1 =1 x-o 1 4.C.解1im1-马2=1im(1+1)2)=e2 Xx→ -x 5.C.解1im1-2x)=1im1+(←2x-2-
1. B．解 2 2 0 sin 4 lim x x x = 4 16 4 sin 4 4 sin 4 lim 2 0 x x x x x ． 2. C．解 x x x 3sin 2 lim 3 3 = . 24 1 8 1 ) sin 2 2 ( 3 1 lim 3 x x x 3. B．解 x x x 1 lim tan x x x 1 1 tan lim 1. 1 cos 1 1 1 sin lim x x x x 4.C．解 x x x 2 ) 1 lim(1 = ) e . 1 lim(1 (2) 2 x x x 5. C．解 x x x 1 0 lim(1 2 ) = ( 2) 2 1 0 lim[1 ( 2) ] x x x = . e 1 2