Question

which term of ap 21,18,15,12,...is-81?also is any term 0?if so find it​

Answer 1

Answer:

-33th term is -81 and-6th term is 0

Step-by-step explanation:

a=21

d=21-18=3

an = -81

an=a + (n-1)d

21 + (n-1)3 = -81

.

.

after simplifying, we get

n=-33

and similarly for finding which term is 0, we get

n=-6

Hope you understood