Question

which term of the ap 84,80,76... is 0

Answer 1

a = 84
d = 80-84 = -4 .

0 = 84 + ( n - 1 ) -4

-84 = -4n+4

-80 = -4n

n = 20 .


Therefore, 0 is the 20th term.

Answer 2

Answer:

20 th term.

Step-by-step explanation:

a=84. d=80-84 = -4.

0=84+(n-1)-4

-84=-4n+4

-80=-4n

-80/-4=n

20=n.

....

Answer is 20 th term.