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प्रश्न
Find 8th term of the A.P. 117, 104, 91, 78, ...
उत्तर
In this problem, we are given different A.P. and we need to find the required term of that A.P.
8th term of the A.P. 117, 104, 91, 78, ...
Here
First term (a) = 117
Common difference of the A.P. (d) = 104 - 117
= -13
Now as we know
`a_n = a + (n -1)d`
So for 8th term
`a_8 = a + (8 - 1)d`
= 117 + (7)(-13)
= 117 - 91
= 26
Therefore, the 8th term of the given A.P. is `a_8 = 26`
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