The sum of the series, (-100) + (-95) + (-90) + … + 110 + 115 + 120, is
Explanation:
(–100) + (-95) + ….. + 120
= [(–100) + (-95) + ….. + 95 + 100] + 105 + 110 + 115 + 120
= 105 + 110 + 115 + 120
= 450
Hence, option (d).
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