>>> from invpow import invpow

--ini

>>> round(invpow(1.1, 1e-2), 4)
9.9847
>>> round(invpow(1.1, 1e-4), 4)
10.9895
>>> round(invpow(2, 1e-1), 4)
1.875
>>> round(invpow(2, 1e-3), 4)
1.998
>>> round(invpow(3.3, 1e-2), 4)
1.4311
>>> round(invpow(3.3, 1e-10), 4)
1.4348

--fi