" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
u8= a + 7b = 125- (eliminasi)
-4b =-60
b =15
a + 3b = 65
a = 65 - 45
a =20
S50 = n/2 ( 2a + (n-1)b)
= 50/2 ( 2x20 + (49)15
= 25 ( 40 +735)
= 25(775) = 19.375
u4=a+3b=65
__________-
4b=60
b=15
a=20
cara cari (a)
u4=a+3.15=65
a+45=65
a=20
s50=1/2n(2a+(n-1)b)
1/2.50(2.20+(50-1)15)
25(40+49.15)
25.775
s50= =19.375