S~ = 15
a = 5
Ditanya
r
Jawab
S~ = a / (1 - r)
15 = 5 / ( 1 - r)
15(1 - r) = 5
15 - 15r = 5
-15r = -5 - 15
-15r = -20
r = -20/-15
r = 4/3
Rasionya 4/3
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S~ = 15
a = 5
Ditanya
r
Jawab
S~ = a / (1 - r)
15 = 5 / ( 1 - r)
15(1 - r) = 5
15 - 15r = 5
-15r = -5 - 15
-15r = -20
r = -20/-15
r = 4/3
Rasionya 4/3