Tolong jawab pakai cara yang lengkap
Jawaban Terkonfirmasi
U6 = a +5b
u9 = a +8b
u12=a +11b
u15= a + 14b
————— +
4a + 38b = 20
s20 = 20/2 ( a + u20)
= 10 ( a + a +19b)
= 10 ( 2a + 19b)
= 5 ( 4a + 38b)
= 5 (2)
= 100 … C
Jawaban Terkonfirmasi
u6 = a +5b
u9 = a +8b
u12=a +11b
u15= a + 14b
————— +
4a + 38b = 20 bagi 2
2a + 19b = 10
S20 = 20/2 ( a + U20)
= 10 ( a + a +19b)
= 10 ( 2a + 19b)
= 10(10)
= 100
jawaban C