Question

if in an AP first time is 7 and last term is 125 the sum of first 15 terms is

Answer 1

Answer:

60 terms

Step-by-step explanation:

thanks for asking

Answer 2

Answer:

a=7 ,n=15

an=125

s15=n/2[a+an]

= 15/2[7+125]

=15/2×132

15×66

=990