Sum of the first n terms of an A.P. having first term a and last term l is
a.n/2(2a-l)
b.n/2(2a+l)
c.n/2(a+l)
d.n/2(a-l)
Answers
Answered by
2
Answer:
option b is the answer.
Step-by-step explanation:
As we know that sum of n terms of an AP = n/2(2a+l)
Answered by
1
Answer:
the answer is b. n/2(2a+1)
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