What is Formula for Sum of Terms in A.P. upto n'th term
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Formula for Sum of terms in A.P upto n th term.
S n = n/2 × (2a+(n-1)d)
Or
S n = n/2 × (a + a"n)
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Sum of terms of any AP upto n terms
a = 1st term, d = common difference
l = last term
Hope it helps...
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