Math, asked by raghuramsharm5, 5 hours ago

The first term and the last term of an arithmetic progression are 'a' and 'T respectively, then the sum of its first 'n' terms is

Answers

Answered by chiliverusravani11
0

Answer:

nT/2

Step-by-step explanation:

Given first term=a

we know that Tn=a+(n-1)d=last term

and also given last term =T

we know that sum of n terms =n/2(a+(n-1)d)

so,sum of n terms =n/2(T)

=nT/2

Answered by hoovaiahmsrujanmh
1

Answer:

Sn=a(n+l)\ 2

Step-by-step explanation:

hope it helps you

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