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How many numbers has ?

We put k-as the numbers of the number , Then we have: where 1<a<10.

By taking the decimal logs in both sides we have:

. **k** is the whole number 1+100log2. As we know that the log2=0.30, we find k=31 numbers.

7 August, 2022

7 August, 2022

7 August, 2022