Jawaban:
78
Penjelasan dengan langkah-langkah:
Un = a + (n - 1)b + (n - 1) (n - 2) × c / 2
U12 = 1+ (12 - 1)2 + (12 - 1) (12 - 2) × 1 / 2
U12 = 1+ (11)2 + (11) (10) / 2
U12 = 1+ 22 + 110 / 2
U12 = 23 + 55
U12 = 78
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Jawaban:
78
Penjelasan dengan langkah-langkah:
Un = a + (n - 1)b + (n - 1) (n - 2) × c / 2
U12 = 1+ (12 - 1)2 + (12 - 1) (12 - 2) × 1 / 2
U12 = 1+ (11)2 + (11) (10) / 2
U12 = 1+ 22 + 110 / 2
U12 = 23 + 55
U12 = 78