Question

If the sum of first 20 terms of the series 20,15 ,-up to 20 terms is -550 find the 20th term of the series

Answer 1

Answer:

-85 is the 20th Term of the given series

Step-by-step explanation:

Given,

First Term = 20

Common difference = -5

20th Term = a+ ( n-1 )d

=20+ ( 20-1 )-5

=20+ (19)-5

=20 +(-95)

=-85.