Question

$if \: the \: sums \: of \: n, 2n,3n terms \: of \: an \: AP \: are \: S1, S2, S3 \: respectively \\ \: then prove \: that \: S1+S2=2S2. \\ dont \: dare \: to \: give \: irrvelant \: answer \\ if \: dont \: know \: then \: leave \\ irrevelant \: answer \: means 10answer \: report$
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Answer 1

Answer:

$if \: the \: sums \: of \: n, 2n,3n terms \: of \: an \: AP \: are \: S1, S2, S3 \: respectively \\ \: then prove \: that \: S1+S2=2S2. \\ dont \: dare \: to \: give \: irrvelant \: answer \\ if \: dont \: know \: then \: leave \\ irrevelant \: answer \: means 10answer \: report$

Answer 2

Answer:

hope it will help

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