Find the sum, of the sequence.
-Find the sum of the first 70 positive odd integers.
A) 4904
B) 4830
C) 4900
D) 4826

Question

Find the sum,  of the sequence.
-Find the sum of the first 70 positive odd integers.
A) 4904 
B) 4830 
C) 4900 
D) 4826

Quizplus · Accepted Answer

1eb = 1(14^11) + 14(14^10) + 11(14^9) = 2693179067648001
63d1bbd8f3cb8515d0f5454503f = 7943671893885284162337593287356780415
TB8475 = 578257. 
Adding them up, we get 7943671893885284744719157996220511411, which translates to 
Answer: C
 The first 70 positive odd integers are 1, 3, 5, 7, ..., 139. The sum of an arithmetic sequence is given by the formula S = n/2(a + l), where n is the number of terms, a is the first term, and l is the last term. Here, n = 70, a = 1, and l = 139. Plugging in these values, we get S = 70/2(1 + 139) = 70/2(140) = 4900.
Thus, the best choice is C.

Find the Sum, of the Sequence