Sum of Arithmetic Series with Negative Terms
XAT 2017 · Quantitative Ability & Data Interpretation · Easy · Quantitative Ability
The sum of series, , is:
- A.
0
- B.
220
- C.
340
- D.
450
- E.
None of the above
Answer
D
Explanation
The terms from to sum to because each negative term cancelled with its positive counterpart. The remaining terms are . Sum .
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