Matematika

Pertanyaan

Dik BA dengan U13=29 dan U17=53 tentukan U50

1 Jawaban

  • Bab Barisan dan Deret(SPLDV)

    U13 = a + (13 - 1) b
    U113 = a + 12 b = 29

    U17 = a + (17 - 1) b
    U17 = a + 16b = 53

    a + 12 b = 29
    a + 16 b = 53
    __________ _
    -4b = -24
    b = 6

    a + 12 b = 29
    a + 12(6) = 29
    a + 72 = 29
    a = 29 - 72
    a = -43

    U50 = a + (n - 1) b
    U50 = -43 + (50 - 1) 6
    U50 = -43 + 49 × 6
    U50 = -43 + 294
    U50 = 251

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