in an ap the sum of nvterms is 5n2-3n.find the ap and also its 10th term
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n=1
5×1²-3×1=5-3=2=a
n=2
5×2²-3×2=20-6=14
2a+d=14
2×2+d=14
d=14-4=10
A.P=2,12,22,32...
a(10)=a+9d
=2+9×10=2+90=92
5×1²-3×1=5-3=2=a
n=2
5×2²-3×2=20-6=14
2a+d=14
2×2+d=14
d=14-4=10
A.P=2,12,22,32...
a(10)=a+9d
=2+9×10=2+90=92
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