sum of n terms of an ap is 5n^2-3n. find the ap and the 10th term
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Sn=5n²2-3n
S(n-1)=5(n-1)²*2-3(n-1)
(5n²+5-10n)2-3n+3
10n²+10-20n-3n+3
10n²-23n+23
an=Sn-S(n-1)
5n²2-3n-10n²+23n-23
20n-23=An
A10=200-23
177
S(n-1)=5(n-1)²*2-3(n-1)
(5n²+5-10n)2-3n+3
10n²+10-20n-3n+3
10n²-23n+23
an=Sn-S(n-1)
5n²2-3n-10n²+23n-23
20n-23=An
A10=200-23
177
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