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a1r 6 = 5832 ()
a1 8
r 6 = 729

r = ±3

.a5 = a1r 4 = 8 ×(±3)4 = 648
:( )

d − a = 3(b − a)

b −a = d −a = r :( ) ( )
33 )

.c − a = 2(b − a) = 2r

3

.d

. −21, − 21 + d, − 21 + 2d, 24

. −6 + 9 = 3

:( ) (

2, 4, 8, 16, 32, 64, … ( )

1, − 2, 4, − 8, 16, − 32, 64, … ( )

1 , 1, 1, 2, 4, 8, 16, 32, 64, … ()
42 ()

1 , 2, 16, 128, …
4

.64 ( )

:( ) ( )