Question

calcula la suma de los primeros términos
que se indica en cada caso.
-3,-1,1,3,5, ... S25 =


2.5,4,5.5,7,8.5,...S300




-10,-14,-18,-22,-26,....S74
​

Answer 1

-3,-1,1,3,5, ... S25 = 7, 9, 11, 13, 15.

2.5,4,5.5,7,8.5,...S300 = 10, 11.5, 13, 14.5, 16.

-10,-14,-18,-22,-26,....S74 = -30, -34, -38, -42, -46.