1.

Find the sum of first 10 termsof an AP :31,26,21,16

Answer»

Answer:

85

Step-by-step explanation:

Sn=n/2[2A+(n-1)d]

=10/2[2(31)+(10-1)-5]

=5[62-45]

=85

d is -5 because 26-35=-5

Hope it helps



Discussion

No Comment Found

Related InterviewSolutions