Find the sum of the digits of:
$$\left\lfloor\frac{k^{h+1}-1}{h-1}\right\rfloor$$
I need to calculate sum of digits in answer. Note as $k$ and $h$ can be a very big value, answer is getting overflow.
What is a better way to calculate this?
2026-03-28 08:50:17.1774687817
How to calculate sum of digit of a power
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