Matematika

Pertanyaan

6,10,14,18,22,...
Tentukan S20 =...

1 Jawaban

  • Materi : Barisan dan Deret
    ------------------------------------

    6 , 10 , 14 , 18 , 22 , ... ,...

    Sn = n/2 ( 2.a + (n - 1) b)
    S20 = 20/2 ( 2.6 + (20 - 1) 4)
    S20 = 10 ( 12 + (19)4)
    S20 = 10 ( 12 + 76 )
    S20 = 10 ( 88 )
    S20 = 880 

    Semoga membantu ... Semangat 
    *Good Luck ^_^

Pertanyaan Lainnya