Page 138 - Numbertheory

@ @@Hßìÿaö§aI@†a‡Èÿa@óî‹Åä@

12 ( ) 10 ( ) 8( ) 6()
[AMC10A 2002] ( )
765 4 321
9
.

190 ( ) 170 ( ) 160 ( ) 150 ( )
n [MAӨ 2009] ( )

n 38

12 ( ) 11 ( ) 10 ( ) 9 ()

n >1 [MAӨ 2011] ( )

BA . 2n

6() 4( ) A +B 3( ) 2 ()
n >1
( )
)
. 2n )

28 ( ) 21 ( ) 14 ( ) 12 ( )

. 217 341 d(

d +4

8( ) 6( ) 4( ) 2 ()
29 × 35 ( )
723 [Aust.MC 1998] (

28 × 36 ( ) 26 ×36 ( ) 25 × 35 ( )

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