Write down three consecutive whole numbers just preceding 5,10,001.

To find the three consecutive whole numbers just preceding 5,10,001, we subtract 1 repeatedly:

1. 5,10,001 - 1 = 5,10,000

2. 5,10,000 - 1 = 5,09,999

3. 5,09,999 - 1 = 5,09,998

Hence, the three consecutive whole numbers just preceding 5,10,001 are 5,10,000, 5,09,999, and 5,09,998.