Answer :

Here, first term = 5


Common difference = 12 - 5 = 7


Given that there are 50 terms in the AP.


To find: Last term, i.e. 50th term = a50


Since an = a + (n - 1)d


a50 = 5 + (50 - 1)7


= 5 + (49) × 7


= 5 + 343


= 348

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