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U3 = ar²
24 = ar²
U10 =
3072 = ar² ×
3072 = 24 ×
= 128
r =
r = 2
U3 = ar²
24 = ar²
24 = a × 2²
24 : 4 = a
a = 6
U7 =
U7 = 6 ×
U7 = 384
semoga membantu :)
U3 = a.r pangkat 2 = 24
jadi pangkat 9 - 2 = 7
3072 : 24 = 128
maka r pangkat 7 = 128
r = 2
jadi a = 6
U7 = ar pangkat n-1
u7 = 6.2 pangkat 6 = 384