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12 Nov 2019
The sum of the first n terms of an arithmetic sequence a_1 a_2, a_3, a_n is 1/2 n(a_1 + a_n), where and a_1 are a_n the first and the nth terms of the sequence, respectively. What is the sum of the odd integers from 1 to 99, inclusive? (A) 2, 400 (B) 2, 450 (C) 2, 475 (D) 2, 500 (E) 2, 550
The sum of the first n terms of an arithmetic sequence a_1 a_2, a_3, a_n is 1/2 n(a_1 + a_n), where and a_1 are a_n the first and the nth terms of the sequence, respectively. What is the sum of the odd integers from 1 to 99, inclusive? (A) 2, 400 (B) 2, 450 (C) 2, 475 (D) 2, 500 (E) 2, 550
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Bunny GreenfelderLv2
23 Apr 2019