找规律,把规律说出来.25.100.225.400.625.900.1225.1600.2025.2500.3025.3600.4225.4900.5625.6400.7225.8100.9025.10000.11025.12100.13225.14400.15625

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找规律,把规律说出来.25.100.225.400.625.900.1225.1600.2025.2500.3025.3600.4225.4900.5625.6400.7225.8100.9025.10000.11025.12100.13225.14400.15625
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找规律,把规律说出来.25.100.225.400.625.900.1225.1600.2025.2500.3025.3600.4225.4900.5625.6400.7225.8100.9025.10000.11025.12100.13225.14400.15625
找规律,把规律说出来.
25.100.225.400.625.900.1225.1600.2025.2500.3025.3600.4225.4900.5625.6400.7225.8100.9025.10000.11025.12100.13225.14400.15625

找规律,把规律说出来.25.100.225.400.625.900.1225.1600.2025.2500.3025.3600.4225.4900.5625.6400.7225.8100.9025.10000.11025.12100.13225.14400.15625
如图:
2 5 5²
1 0 0 10²
2 2 5 15²
4 0 0 20²
6 2 5 25²
9 0 0 30²
1 2 2 5 35²
1 6 0 0 40²
2 0 2 5 45²
2 5 0 0 50²
3 0 2 5 55²
3 6 0 0 60²
4 2 2 5 65²
5,15,20,25,30,35……相差为5的数的平方

分别是5² 10² 15²  20²……
第n个为(5n)²

25*N²

25 225 625 1225 2025 3025......
5² 15² 25² 35² 45² 55²......
末位是5的 数的平方
100 400 900 1600 2500 3600 4900......
差 300 500 700 900 1100 1300......

每个数/25

1,4,9,16,25,36,....

an=25 *n^2=(5n)^2

25 5的倍数
100 10的倍数
225 15的倍数
……
5、10、15……是相差为5的等差数列。