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Find the sum on n term of the A.P.
S
n
=
[2a + (n – 1) d]
=
[10 + (n – 1) -3]
=
[13 – 3n]
2
[2a + (n – 1) d]
[10 + (n – 1) -3]
[13 – 3n] [2a + (n – 1) d] [10 + (n – 1) -3] [13 – 3n]