" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
tali terpanjang = U 4 = 54
Un = a x r pangkat (n-1)
U4 = 16 x r pangkat (4-1) = 54
r ³ = 54/16
r³ = 27/8
r³ = 3³/2³
r = 3/2
Sn = a (r pangkat n - 1)
r - 1
S4 = 16 ( (3/2)pangkat4 - 1)
3/2 - 1
= 16 (81/16 -1)
3/2 - 2/2
= 16 ( 65/16) (2/1)
= 65x2 = 130 cm
54=16.r^4-1
54=16.r^3
r^3=54/16
r=√27/6
r=3/2
u2=16.3/2^2-1
u2=16.3/2
u2=24
u3=16.3/2^3-1
u3=16.3/2^2
u3=16.9/4
u3=36
p tali mula2= 16+24+36+54=130 cm
semoga membantu