下面的数列中,那些是等差数列?如果是,请指明公差,如果不是,说明理由。'm-[/C,|8J+G
(1)6,10,14,18,22……'m-[/C,|8J+G
答:5`,}*j)|.u(k._等差数列,公差是3b(g0M5B'x6v1{。'm-[/C,|8J+G
(2)9,8,7,6,5,4,3,2,1'm-[/C,|8J+G
答:.t:H8u1{)F(R1j6R等差数列,公差是1E:E1y5~9Z.h*u3V1}(f4N)A。'm-[/C,|8J+G
(3)3,3,3,3,3,3,3,3,3'm-[/C,|8J+G
答:+W7R-H,x7N*G.M5H:a/Z等差数列,公差是;Q0d*{1J:H/j0@(S3i9l)C:c。'm-[/C,|8J+G
(4)1,2,1,2,1,2,1,2'm-[/C,|8J+G
答:+z,`:q2q:a等差数列。'm-[/C,|8J+G
(5)1,2,4,8,16,32,64'm-[/C,|8J+G
答:+K8x8R)?7N2P4t7D2e+o等差数列。'm-[/C,|8J+G