Page 42 - DIGITAL BOOK MUHAMMAD AZWARDI NASUTION

Suku tengah barisan geometri

n = 3  , a ar , ar 2

U = U 1
t

2 (n+ ) 1 n = 5  , a ar , ar 2 , ar 3 , ar 4

1 (n+ 1 ) 1 n = 7  , a ar , ar 2 , ar 3 , ar 4 , ar 5 , ar 6
−
U = ar 2
t

1 (n+ 1− ) 2
U = ar 2
t

1 (n− ) 1

U = ar 2 = a 2 r . n− 1
t

U = ar . a n− 1
t

U = U . a n
t

U = U 1 U . n
t