Question

how any terms of AP 27 24 21 ....should be taken so that the answer is 0

Answer 1

Step-by-step explanation:

a=24

d=24-27= -3

Tn=a+(n-1)d

0=24+(n-1)-3

-24=(n-1)-3

-24/-3=n-1

8=n-1

9th term=n

Answer 2

Answer:

so sum of 19 terms=0

Step-by-step explanation:

27 24 21 -----------

here a=27 and d=24-27=-3

let sum of n terms=0

so n/2 ( 2a+(n-1)d)=0

or 2a+(n-1)d=0

2*27+(n-1)(-3)=0

-3(n-1)= -54

n-1=-54/-3=18

n=19

so sum of 19 terms=0