" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
U10 = 20
U10 = a + 9b
155 = 20 +9b
b = 15
S10 = n/2 (2a + (n-1)b)
S10 = 5 (40 + 135)
S10 = 875 cm
u20 = 155
maka bedanya = 15 ,, SN = 20 : 2 ( 20 (20 - 1) 15) = 3050