Barisan Aritmerika

a = 2

b = 0

U₃ = 6

a = -2

b = 4

$U_n=a-\left(n-1\right)b$

$U_n=a+\left(n-1\right)b$

$U_n=a-\left(n+1\right)b$

$U_n=a+\left(n+1\right)b$

$U_n=a\left(n-1\right)b$

$U_{tengah}=\frac{1}{2}\left(U_{awal}+U_{akhir}\right)$

$U_{tengah}=\frac{1}{2}\left(U_{awal}-U_{akhir}\right)$

$U_{tengah}=U_{awal}+U_{akhir}$

$U_{tengah}=\frac{1}{4}\left(U_{awal}+U_{akhir}\right)$

$U_{tengah}=U_{awal}-U_{akhir}$

68

43

42

22

21

16

14

12

8

10

135 + 8n

119 + 8n

8n

135 - 8n

119 - 8n

17

20

23

26

29