Diketahui barisan bilangan 3,8,13,18,23,…….suku ke-28 adalah

6 sec read


Diketahui barisan bilangan 3,8,13,18,23,…….suku ke-28 adalah​

Jawaban:

138

Penjelasan dengan langkah-langkah:

Barisan tersebut merupakan barisan geometri, sehingga :

un = a + (n - 1)b \\ un = 3 + (28 - 1)5 \\ un = 138

a = bilangan awal = 3

n = suku ke-28

b = beda/selisih = 5

Jadi, suku ke-28 adalah 138.


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