lnn21lnn11x?n(n?N)2?1?2?2?(1?2) ...(10֣
nnn2n2??=
ln2ln3?2?223?lnn1?11?1??1??22n22?23??1?1) n21111(n?1)?(2?2??1). 22223n?112(n?1)?12(12?3?13?4?n(n?1)) =
11112(n?1)?2(2?3?13?14??1n?1n?1) =11112(n?1)?2(2?n?1) =2n2?n?14(n?1) ʽ. ..(13֣ ƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵоƷƼ ǿƼ ֵӵ ....(11֣
Ʒĵ ǿƼ
ƷǿƼؼʹþƷǿƼؼʹþƷǿƼؼʹ
ƷǿƼؼʹ ƷǿƼؼʹ ƷǿƼؼʹ ƷǿƼؼʹ ƷǿƼؼʹ ƷǿƼؼʹ ƷǿƼؼʹ ƷǿƼؼʹ