Question

Sum of the first n terms of an A.P. having first term a and last term l is
(2a-2) (2a + 2) (c) ž (a +1)
2 (2a
d) (a - 1)​

Answer 1

Step-by-step explanation:

as per the given condition in question this is right dear...☺️

Sn = n/2 + ( a + l )

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