document.write( "Question 1041417: If S6 = 189 and r = 2, what is a1?\r
\n" ); document.write( "\n" ); document.write( "9
\n" ); document.write( "6
\n" ); document.write( "3
\n" ); document.write( "3/2
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Algebra.Com's Answer #656420 by ikleyn(52875)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "On geometric progressions read the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Geometric progressions\r
\n" ); document.write( "\n" ); document.write( "    - The proofs of the formulas for geometric progressions \r
\n" ); document.write( "\n" ); document.write( "    - Problems on geometric progressions\r
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