Matematika

Pertanyaan

diketahui barisan aritmatika U3=13 U5=21 tentukan U10

2 Jawaban

  • Kelas 8 Matematika
    Bab Barisan dan Deret Bilangan

    b = (U5 - U3)/(5 - 3)
    b = (21 - 13)/2
    b = 8/2
    b = 4

    U10 = U5 + 5 . b
    U10 = 21 + 5 . 4
    U10 = 21 + 20
    U10 = 41
  • b = 21 - 13 / 5 - 3
    b = 8/2 = 4

    U3 = a + 2b
    13 = a + 2(4)
    a = 13 - 8
    a = 5

    U10 = U5 + 5.b
    U10 = 21 + 5.4
    U10 = 21 + 20 = 41

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