99,93,87,81,........,U22=
Matematika
Riyad261
Pertanyaan
99,93,87,81,........,U22=
1 Jawaban
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1. Jawaban cingcang
Barisan Aritmatika
99,93,87,81,........,
U22=
a = 99
b = 93 - 99 = 87 - 93 = -6
suku ke 22
Uₙ = a + (n-1) b
U₂₂ = 99 + (22-1) (-6)
U₂₂ = 99 - 21 × 6
U₂₂ = 99 - 126
U₂₂ = - 27 ✓