History of Hindu Mathematics: A Source Book v2.c17.s8.63
History of Hindu Mathematics: A Source Book v2.c17.s8.63
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v2.c17.s8.63
**Âryabhaṭa II.** The formula for the number of terms (n) of an A.P. whose first term (a), common difference (b) and sum (s) are known is given by Âryabhaṭa II (*c.* 950) as follows :²