Question

how many terms of an AP 27 24 21.. should be taken so that the sum is zero​

Answer 1

Answer:

here,

a = 27

d = -3

an = a+(n-1)d

0 = 27+(n-1)*-3

0 = 27-3n+3

-27-3 = -3n

-30 = -3n

-30/-3 = n

n = 10

10 terms of should be taken so that the sum is zero.