Question

[dragom Đức]

Tim so thu 100 cua day : 2,5,10,17,26,...................

Answer 1

[Trung Nguyen]

2,5,10,17,26,...2,5,10,17,26,...

2=12+12=12+1

5=22+15=22+1

10=32+110=32+1

17=42+1=1717=42+1=17

.........

số thứ 100 là : 1002+1=10000+1=100011002+1=10000+1=10001