4.10…. ….34.44. soal nya. pilihan. A.17.26. B.16.22. C .17.25. D.11. dengan caranya
Barisan bertingkat
4 + 6 = 10
10 + 7 = 17
17 + 8 = 25
25 + 9 = 34
34 + 10 = 44
4, 10 , 17, 25, 34, 44
jawaban : c. 17,25
4,10,…,…,34,44
= 4, (4+6), … , … , (4+6+7+8+9), (4+6+7+8+9+10)
= 4, (4+6), (4+6+7), (4+6+7+8), (4+6+7+8+9), (4+6+7+8+9+10)
= 4, 10, 17, 25, 34, 44
= C