Find the middle term of the A.P. 213, 205, 197, ..., 37.

Explanation

Let `a`= first term of `A.P`
`d`=common difference

So,`n`th term, `a_n​=a+(n−1)d`


Here `a=213`
`d=205−213=−8,a_n​=37`

`a_n​=a+(n−1)d`

`=>37=213+(n−1)(−8)`

`=>176=8(n−1)`

`=>8n=184
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