Jawab :
Un = 95
a+(n-1) b = 95
10+(n-1) 5 = 95
10+5n-5=95
5n=90
n= 18
Penjelasan dengan langkah-langkah:
Mencari n18
Dik :
n=18
a=10
Un= 95
Dik : angka yg habis dibagi 5
Jawab :
Sn= n/2 (a+Un)
S18 = 18/2 (10+95)
=9(105)
= 945
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Jawab :
Un = 95
a+(n-1) b = 95
10+(n-1) 5 = 95
10+5n-5=95
5n=90
n= 18
Penjelasan dengan langkah-langkah:
Mencari n18
Dik :
n=18
a=10
Un= 95
Dik : angka yg habis dibagi 5
Jawab :
Sn= n/2 (a+Un)
S18 = 18/2 (10+95)
=9(105)
= 945