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Verified answer
Mapel : MatematikaKelas : IX SMP
Bab : Barisan dan deret
Pembahasan :
Beda = (U8 - U5)/(8 - 5)
Beda = (29 - 14)/3
Beda = 15/3
Beda = 5
U5 = 14
a + 4b = 14
a + 4(5) = 14
a + 20 = 14
a = -6
Suku Pertama = -6