.If the sum of the first n terms of an AP is 3n2 + 1 and its common difference is 6, then
find the first term
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GIVEN :-
- The sum of the first n terms of an AP is 3n² + 1.
- Common difference is 6.
TO FIND :-
The first term of the A.P.
SOLUTION :-
We know,
Therefore, the first term of the A.P. is 4.
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