Question

2. Find the sum of each of the following arithmetic series:
(1) 7+102 + 14 + ... +84.

Answer 1

Step-by-step explanation:

7+102+14....+84.

7+102+14+204+84.

I think u Understand the answer.

Answer 2

Answer:

ans...it is not in the anthemic progression..because there is noo common difference

Step-by-step explanation:

7+102+14....+94

difference = 102-7=95....d1

15-102= -87.......d2

from here we can tell that..d1 and d2 are not equal soo there sum cannot find by arithmetic progression and they are not in arithmetic progression also....