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Prove the statement holds for all positive integers: 2 + 4 + 6 + ... + 2n = n² + n
answered
Feb 3, 2018
Mathematics
high-school
3
votes
171k
views
Where did African Americans face the most discrimination in the 1920s?
answered
Feb 24, 2017
History
high-school
5
votes
210k
views
The office that prepares the budget for the executive office is the
answered
Apr 29, 2016
Social Studies
high-school
3
votes
70.3k
views
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