Which term of the AP: 21,18,15,----------- is -81 also,is any term 0 koi solution bata do plz

Which term of the AP: 21,18,15,----------- is -81 also,is any term 0 k

1.	Which term of the AP: 21,18,15,----------- is -81 also,is any term 0 koi solution bata do plz
Answer» An= -81 -81=21+(n-1)-3n=35 -81 ko last term lekr solve kr