U3 = a + 2b = 13
U7 = a + 6b = 29
------------------- -
- 4b = - 16
b = 4
a + 2b = 13
a + 2(4) = 13
a + 8 = 13
a = 5
Diketahui:
Ditanyakan:
U1 = ... ?
Penyelesaian:
beda barisan
6b - 2b = 29 - 13
4b = 16
suku pertama
a + 6b = 29
a + 6(4) = 29
a + 24 = 29
==================
Kelas: 9
Mapel: Matematika
Bab: Barisan dan Deret Bilangan
Kode: 9.2.2
Kata Kunci: Barisan aritmatika
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Verified answer
U3 = a + 2b = 13
U7 = a + 6b = 29
------------------- -
- 4b = - 16
b = 4
a + 2b = 13
a + 2(4) = 13
a + 8 = 13
a = 5
Diketahui:
U3 = a + 2b = 13
U7 = a + 6b = 29
Ditanyakan:
U1 = ... ?
Penyelesaian:
beda barisan
6b - 2b = 29 - 13
4b = 16
b = 4
suku pertama
a + 6b = 29
a + 6(4) = 29
a + 24 = 29
a = 5
==================
Detil Jawaban
Kelas: 9
Mapel: Matematika
Bab: Barisan dan Deret Bilangan
Kode: 9.2.2
Kata Kunci: Barisan aritmatika