Tentukan U20 diket U3=12 U8=27
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Pertanyaan
Tentukan U20 diket U3=12 U8=27
1 Jawaban
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1. Jawaban cupid85
Un = a + ( n - 1 ) b
U3 = a + 2b = 12
U8 = a + 7b = 27
------------------------(-)
- 5b = - 15
b = 3
a + 2b = 12
a + 2(3) = 12
a + 6 = 12
a = 12 - 6
a = 6
U20 = a + 19b
= 6 + 19(3)
= 6 + 57
= 63