" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Verified answer
Kelas 8 MatematikaBab Barisan dan Deret Bilangan
a] b = U2 - U1
b = 5 - 1
b = 4
Sn = n/2 . (2a + (n - 1) . b)
S30 = 30/2 . (2 . 1 + 29 . 4)
S30 = 15 . (2 + 116)
S30 = 15 . 118
S30 = 1.770
b] b = U2 - U1
b = 7 - 2
b = 5
Sn = n/2 . (2a + (n - 1) . b)
S30 = 30/2 . (2 . 2 + 29 . 5)
S30 = 15 . (4 + 145)
S30 = 15 . 149
S30 = 2.175