Page 9 - Barisan & Deret Kls 11 Math Wajib_Classical
P. 9
Ciri deret aritmatika
Ada simbol (+) Jumlah
2 + 4 + 6 + 8 + … = ℎ
= (2 + − 1 )
= = 2
1
= ( + )
ℎ 2
2 + 8 + 14 + 20 + 26 + …
= − = − = 8 − 2 = 6
?… 10 −1 2 1
10
= (2 2 + 10 − 1 6 )
Jwb 10 2
= 2 10 = 5(4 + 9 6 )
10 = 5(4 + 54 ) = 5(58) = 290
