___________________________________________
a = 25
b = 3
n = 8
Sn = n/2 × [ 2a + ( n - 1 )b ]
S8 = 8/2 × [ 2( 25 ) + ( 8 - 1 )3 ]
S8 = 8/2 × [ 50 + ( 7 )3 ]
S8 = 8/2 × [ 50 + 21 ]
S8 = 8/2 × 71
S8 = 568/2
S8 = 284 Kursi
S8
Sn = n/2(2a + (n - 1)b)
S8 = 8/2(2(25) + (8 - 1)3)
S8 = 4(50 + 21)
S8 = 4(71)
S8 = 284
Jadi, jumlah kursi pada aula adalah 284 kursi.
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
SOAL 1
___________________________________________
a = 25
b = 3
n = 8
___________________________________________
Sn = n/2 × [ 2a + ( n - 1 )b ]
S8 = 8/2 × [ 2( 25 ) + ( 8 - 1 )3 ]
S8 = 8/2 × [ 50 + ( 7 )3 ]
S8 = 8/2 × [ 50 + 21 ]
S8 = 8/2 × 71
S8 = 568/2
S8 = 284 Kursi
___________________________________________
Diketahui
Ditanya
S8
Penyelesaian
Sn = n/2(2a + (n - 1)b)
S8 = 8/2(2(25) + (8 - 1)3)
S8 = 4(50 + 21)
S8 = 4(71)
S8 = 284
Jadi, jumlah kursi pada aula adalah 284 kursi.