{ n } 1 ; d ; | { bn } b 1 ; q ; | |
an +1= an + d | bn +1= bn q | |
1Î R; d Î R; | b 1¹0; q ¹0; | |
an = a 1+(n -1) d | bn = b 1 qn -1 | |
an +1+ an -1=2 an | bn +1 bn -1= bn 2 (bn ¹0) | |
n | ||
(0<| q |<1) |
6. . .
.
1 ( ): f () = 0, 0 , x 0 .
.
2 ( ): f () = 0, e >0 d >0, , Î , ¹ 0, | x - 0|< d, | f (x)- A |< e.
1: .
3 ( ): () f () = 0, 0 n () 0, . .
4 ( ): () f () = 0, e >0 d >0, , Î , ¹ 0, 0< x < 0+ d ( 0+ d < x < 0), | f (x)- A |< e. .
2: f () = 0 , , .
5: f () +¥ ( -¥), , n () .
+¥ -¥ ,