The first and last term of A.P. are 1 and 11 . If sum of its terms is 36 then number of terms will be ?
Answers
Answered by
5
It will be 6
S = n/2(a+l)
S = n/2(a+l)
Answered by
10
we know that,
Sn = n/2 ( a+ l )
Given :-
a = 1
l = 11
Sn = 36.
➡ 36 = n/2 ( 1 + 11 )
➡ 36 * 2 = 12n
➡ n = 6.
so, no of terms (n) = 6.
Hope it will help you !!!
Sn = n/2 ( a+ l )
Given :-
a = 1
l = 11
Sn = 36.
➡ 36 = n/2 ( 1 + 11 )
➡ 36 * 2 = 12n
➡ n = 6.
so, no of terms (n) = 6.
Hope it will help you !!!
rmrahulmeena1:
thanks
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