Asked by warnar
find the sum of the series 1-2+3-4+5-6+...to n terms.
Answers
Answered by
Steve
pair them up.
(1-2)+(3-4)+...
That's basically just n/2 * -1
depending on n even or odd.
(1-2)+(3-4)+...
That's basically just n/2 * -1
depending on n even or odd.
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