Tentukan suku ke-n dari barisan bilangan

By Admin ReiPosted on December 10, 2022

Tentukan suku ke-n dari barisan bilangan

Tentukan suku ke-n dari barisan bilangan

Penjelasan dengan langkah-langkah:

$1) : 2,4,6,8,10,...$

$a = 2$

$b = 4 - 2 = 2$

$un = a + (n - 1)b$

$un = 2 + (n - 1)2$

$un = 2 + 2n - 2$

$un = 2n$

.

$2) : 5,7,9,11,13,...$

$a = 5$

$b = 7 - 5 = 2$

$un = a + (n - 1)b$

$un = 5 + (n - 1)2$

$un = 5 + 2n - 2$

$un = 2n + 3$

.

$3) 1,4,7,10,13,...$

$a = 1$

$b = 4 - 1 = 3$

$un = a + (n - 1)b$

$un = 1 + (n - 1)3$

$un = 1 + 3n - 3$

$un = 3n - 2$

.

$4) : 2,6,10,14,18,...$

$a = 2$

$b = 6 - 2 = 4$

$un = a + (n - 1)b$

$un = 2 + (n - 1)4$

$un = 2 + 4n - 4$

$un = 4n - 2$

.

$5) : 11,16,21,26,31$

$a = 11$

$b = 16 - 11 = 5$

$un = a + (n - 1)b$

$un = 11 + (n - 1)5$

$un = 11 + 5n - 5$

$un = 5n + 6$

.

semoga membantu