Question

Find the sum of the following ap are 2,712, to 10 term

Answer 1

Formula-Sn=n/2(2a+(n-1)d
a=2
d=710
n=10
Sn=10/2(2×2+(10-1)710
Sn=5(4+9×710)
Sn=5(4+6390)
Sn=5(6394)
Sn=31970

Answer 2

Answer:

Step-by-s(I) 2,7,12........ up to 10 terms

a=2,d=7−2=5

S  

n

​  

=  

2

n

​  

[2a+(n−1)d]

=  

2

10

​  

[2(2)+(10−1)5]

=5[4+9×5]

=5×49

=245

Step explanation:

Hope it is use full to to you.....

Please mark me as an brainliest