Page 15 - Math Grade 11 (Advance)
P. 15
PROEUS DARA
.,. n-1
~ !TitnUJJ1 2 an·= a! + 2 bk th m g n ";:: 2 '1
k = 1
a -a = b 1
2
1
a3- a2 = bz
a4- a3 = b3
+
an-I- an-2 = bn-2
an-an-I = bn-1
n-1
an= al+(bt+bz+b3+ ... +bn-l) =at+ }:bk
k =I
crtmg n = 1 t?iQ1S bn-I = b <@a'i:fla '1
0
0 fQl ':It:»
lirl.IHHH? n ta nHi 2, 4, 8, 14, 22, 32, ... '1
1J I)
1
tH~tt5 fflb a ctl~g n 'fa~n~tH1H?i~ '1
11
1
eJ 0 '
ti::lbli'i:flS~ b 11 lirulnH:Ilru b" = an+t-an
~n (b ) : 2, 4, 6, 8, ...
11
1
Mn (h, ) mwnana~i::lru'Hlan9
li 1 I) I) 1'1 1J
t t
b = 2 + 2(n- 1) = 2n
11
10
