Question

solution plzzzz solv plz​

Answer 1

a=6

d=13-6= 7

by

A12= a+( n-1) d

6+(12-1)7

6+11×7

6+77

83

sum of first 12 term

Sn= n/2( a+( n-1)d

S12= 12/2(6+(12-1)7)

6(6+(11)7

6 (6 + 77)

6×83

=498

hope it helps....