" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a =
Un = a + (n-1)b
8 = a + 24
a = -16
Sn = n/2 (2a + (n-1)b)
= 9/2 (-32 + 8 X 12)
= 9/2 X 54 = 9 X 27 = 243 ")
Maaf kalo salah
a+2b = 8 ⇒ a + 24 = 8 ⇒ a = -16
suku pertama = a+(n-1)b ⇒ -16 + 0 = -16
S⁹ = n/2 (2a +(n-1)b)
= 9/2 ( -32 + 8x12)
=9/2 (-32 + 96)
= 9/2 x 64
=288