Q.Pada barisan bilangan 8,12, 16, 20, 24,...tentukan suku ke - 20Kek biasa -,-

Q.Pada barisan bilangan 8,12, 16, 20, 24,…tentukan suku ke – 20Kek biasa -,-

$bold{= a + ( n - 1 ) × b}$

$bold{ = 8 + ( 20 - 1 ) × 4}$

$bold{ = 8 + 19 × 4}$

$bold{ = 8 + 76}$

${{boxed{texttt{ = 84}}}}$

${boxed{boxed{red{texttt{Answer By : Silah1234}}}}}$

Penjelasan dengan langkah-langkah:

a = 8

b = 12 – 8 = 4

Suku Ke-20 :

Un = a + (n – 1)b

U20 = 8 + (20 – 1)4

U20 = 8 + 19·4

U20 = 8 + 76

U20 = 84