Question

if the 3rd term and 9th term of Ap are 4 and -8 respectively which term of the Ap is zero ​

Answer 1

Answer:

please look for the answer in the attacchment. Hope it helps

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Given: a3=4, a9=-8, an=0

To find: n=?

Formula: an=a+(n-1)d

a3=a+2d=4

a9=(-)a+(-)8d=(+)-8

-6d=12

d=-12/6=-2

subsitute d in any one of the equation:

a+2(-2)=4

a=4+4=8.

Now, an=0

0=8+(n-1)(-2)

0=8-2n+2

0=10-2n

2n=10

n=10/2=5.

Therefore, 5th term of the sequence is 0.

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