Question

The first and last terms of an AP are a and l respectively. Show that the sum of the nth term from the beginning and the nth term form the end is ( a + l ).

Answer 1

In the given AP, first term = a and last term = l. 

Let the common difference be d. 

Then, nth term from the beginning is given by

Hence, the sum of the nth term from the beginning and the nth term from the end (a+1).

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