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OpenStudy (clamin):
Which of the following is the pyramid number sequence? a.1,5,14,30,55,... b.. 1,3,6,10,15,.. c. 1,1,2,3,5,... d.1,4,9,16,25 e. 1,2,4,8,16,....
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OpenStudy (lrki):
The sequence should be 1², 1² + 2², 1² + 2² + 3², 1² + 2² + 3² + 4², 1² + 2² + 3² + 4² + 5², ... which is 1, 5, 14, 30, 55, so it's A
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