Matematika

Pertanyaan

Dik : u1=10 u2=5a+4 u3=7a+4
Dit : u12.....?

1 Jawaban

  • U1
    3a + 4 = 10
    3a = 10-4
    3a = 6
    a = 6:3
    a = 2

    U2
    = 5a + 4
    = 5(2) + 4
    = 10 + 4
    = 14

    Beda
    = U2 - U1
    = 14 - 10
    = 4

    U12
    = a + (n-1)b
    = 10 + (12-1)2
    = 10 + (11)2
    = 10 + 22
    = 32

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