Question

first term=15, common different=-3
not other comments.​

Answer 1

Explanation:

ap= 15,12,9,6,3,0,-3,-6 till n

Answer 2

Answer:

an required AP : 15,12,9,6,3........

Explanation:

given first term(a)=15

common difference(d)=-3

then

a2=a+d=15+(-3)=15-3=12

a3=a+2d=15+2(-3)=15-6=9

a4=a+3d=15+3(-3)=15-9=6

a5=a+4d=15+4(-3)=15-12=3