document.write( "Question 863678: a statement Sn about the positive integers is
\n" ); document.write( "given. Write statements S1, S2, and S3, and show that each of these
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\n" ); document.write( " Sn: 3 + 4 + 5 + 6 + (n + 2) = n(n + 5)/2
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Algebra.Com's Answer #520578 by richwmiller(17219)\"\" \"About 
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S1 =1*(6/2)=3
\n" ); document.write( "3=3
\n" ); document.write( "S2=2*(7)/2=7
\n" ); document.write( "3+4=7
\n" ); document.write( "S3=3*(3+5)/2=12
\n" ); document.write( "3+4+5=12\r
\n" ); document.write( "\n" ); document.write( "S4=4*(4+5)/2=2*9=18
\n" ); document.write( "3+4+5+6=18\r
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