pada barisan aritmatika U5 = 6 dan U6 = 9 tentukan lah suku ke 10

U5=6
U6=9
b= 9-6/6-5=3/1=3

U10=U6 + 4b
U10=9 + 4(3)
U10=9 + 12=21

Semoga membantu

U5=6
U6=9
U10...?

J A W A B:
U5 = a + 4b = 6
U6 = a + 5b = 9
_____________ -
= -1b = -3
= b = 3

U5 = a + 4b = 6
= a + 4(3) = 6
= a + 12 = 6
= a = 6-12
= a = -6

U10 = a + 9b
= -6 + 9(3)
= -6 + 27
=21