练习1-5 1.计算下列极限: (1)imx2+5 lim x2. ()lim 2x+1 (4)lim 432 x (5)lim (x+h) h
练习 1-5
()im(2-+2) x→ ) lim x→02x2-x-1 (8 )lim (9)lim 6x+8 x→4 (10)lim(1+)(2--); (11)lim(+++ 24
(2)lim 1+2+3+…+(n-1) (13)li (n+1)(n+2)(n+3 5n3 (14)lim( x11-x1 2.计算下列极限: 2x2 (2)lim x→∞2x+1 (3)lim(2x32-x+1) x→
3.计算下列极限: ()limx sin (2 )lim arctanx
练习1-6 1.计算下列极限: ()lim (2)lim tan 3x x ()lim SIn 2x x→0sin5x (4)limxcotx (5)lim - 2x x→0 sinx
练习 1-6