I got 1325 or B)
Sum(25) = (25/2)( -14 + 24(5))
= (25/2)(106) = 1325
Find S25 for (-7) + (-2) + 3 + 8 +...
A. 1,320
B. 1,325
C. 825
D. 820
I think A
2 answers
8 es el 25%de
A. 1,320
B. 1,325
C. 825
D. 820
I think A
2 answers