Matematika

Pertanyaan

99,93,87,81,........,U22=

1 Jawaban


  • 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 ✓

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