Question

If the first term of an A.P is 8 and 12th term is 63, then sum of 12 terms of an A.P is​

Answer 1

Answer:

426

Step-by-step explanation:

a=8

a12=63

Sn=n/2(a+an)

S12=12/2(8+a12)

S12=6(8+63)

=6(71)

=426

Answer 2

Answer:

First term=a=8.

a12=63.

s12=?.

sn=n/2(a+an).

s12=12/2(a+a12).

s12=6(8+63).

s12=6(71).

s12=426.

I think this is your answer.