find the sum of the series
7^2+9^2+11^2+............n terms

72+92+112+....n termsan=2n+52=4n2+20n+25Sn=4n2+20n+25=4nn+12n+16+20nn+12+25=2nn+12n+13+10nn+1+25=2n2+n2n+1+30nn+1+753=22n3+3n2+n+30n2+n+753=4n3+6n2+2n+30n2+30n+753=4n3+36n2+32n+753   ANS...

  • 6
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