Find:8th term of the A.P. $117, 104, 91, 78, ………..$

Given:

Given A.P. is $117, 104, 91, 78, ………..$

To do:
We have to find the 8th term of the given A.P.

Solution:

Here,

$a_1=117, a_2=104, a_3=91, a_4=78$

Common difference $d=a_2-a_1=104-117=-13$

We know that,

nth term $a_n=a+(n-1)d$

Therefore,

8th term $a_8=117+(8-1)(-13)$

$=117+7(-13)$

$=117-91$

$=26$

The 8th term of the given A.P. is $26$.  

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Updated on: 10-Oct-2022

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