Mohon dibantu ya kk:)

a) 1/5, 1/25,......
a = 1/5
r = 1/25 : 1/5 = 1/5
S tak hingga = 1/5 / (1-1/5) = 1/5 / 4/5 = 1/4

b) 1/3, 1/15, .....
a = 1/3
r = 1/15 : 1/3 = 1/5
S tak hingga = 1/3 / (1-1/5) = 1/3 / 4/5 = 5/12

c) 1/2, 1/6, ....
a = 1/2
r = 1/6 : 1/2 = 1/3
S tak hingga = 1/2 / (1-1/3) = 1/2 / 2/3 = 3/4

d) 3, -1, 1/3,.....
a = 3
r = -1/3
S tak hingga = 3 / (1+1/3) = 3 / 4/3 = 9/4


Semoga membantu, Tetap semangat
JKira