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Nov
22
comment How to explain that division by $0$ yields infinity to a 2nd grader
@HagenvonEitzen with this reasoning what would have you said the first time someone said i² = -1 ? ERROR like the stup** windows calc ?
Jul
27
comment How to detect when continued fractions period terminates
That's what Gerry Myerson answered but it only applies to square roots, sorry !
Jul
5
comment Compute $\sum_0^{n-1}2^i11^{n-i-1}\bmod10^9$ when $n=13^{17}$
Now it becomes easy as pie :) thank you !