TOLONG DIBANTU PLISSSSS ​

By Posted on

TOLONG DIBANTU PLISSSSS ​

TOLONG DIBANTU PLISSSSS ​

Pembahasan :

Rumus 1 ( khusus bilangan ganjil) :

2n – 1

2(15) – 1

30 – 1

29

________________________

Rumus 2 ( barisan aritmatika) :

Un = a + ( n – 1 ) × b

U15 = 1 + ( 15-1 ) × 2

U15 = 1 + 14 × 2

U15 = 1 + ( 14×2 )

U15 = 1 + 28

U15 = 29

.