平方數者,整數平方之所得也,記曰 n 2 , n ∈ N \ ,n\in \mathrm } ,其n取值無窮,故其無窮。
n | n2 | n | n2 |
---|---|---|---|
0 | 0 | 11 | 121 |
1 | 1 | 12 | 144 |
2 | 4 | 13 | 169 |
3 | 9 | 14 | 196 |
4 | 16 | 15 | 225 |
5 | 25 | 16 | 256 |
6 | 36 | 17 | 289 |
7 | 49 | 18 | 324 |
8 | 64 | 19 | 361 |
9 | 81 | 20 | 400 |
10 | 100 |
若五七三十五
若 ,且自五進制即成之
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