this is the question i am confused in an=7+6(n-)

Question

plz help

Answer 1

an=a1+d(n-1)

a1 =1st term, d=common difference of an arithmetic sequence

a1=7, d=6

an=7+6(n-1)

a1,a2,a3,...an

7,13,19,...

a2=7+6(2-1)=7+6(1)=7+6=13

each term is 6 more than the previous term

a3=a2+6=13+6=19

a3=7+6(3-1)=7+6(2)=7+12=19