if we know log(a) and log(b) how we can find log(a+b) approximately to real value?
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if we know log(a) and log(b) how we can find log(a+b) approximately to real value?
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log(exp(log(a))+exp(log(b)))
If a and b are close numbers, you can approximate using the following formula:
For example, if a = b, then![](https://espresso.codeforces.com/5996858eb4965180ce408c9a773ec5a2b17907ee.png)
why
and
need to be close for this formula to work?
(in addition to
, ofcourse) sufficient?
isn't
This formula works OK, but if
is some small number, you can remember its logarithm and thus approximate
without calculator or paper — that was the point.
ah i see what u mean. thanks! :)