What is the sum of the integers between $-sqrt13$ and $sqrt39$ ?

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Answer 1 · 2016-11-02T10:54:38

15

$-sqrt(13) ~= -3.6$

$sqrt(39) ~= 6.2$

Hence the integers between $-sqrt(13)$ and $sqrt(39)$ are:

$-3, -2, -1, 0, 1, 2, 3, 4,5,6$

And the sum of these integers is: $4+5+6 = 15$

What is the sum of the integers between -sqrt13-sqrt13 and sqrt39sqrt39?