document.write( "Question 1068919: For the following geometric sequence find the recursive formula: {-1, 3, -9, ...}.\r
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Algebra.Com's Answer #684240 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "You either know or don't know what is a geometric progression.\r
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\n" ); document.write( "\n" ); document.write( "If you know, you will solve the problem in 3 seconds.\r
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\n" ); document.write( "\n" ); document.write( "If you don't know then learn it.\r
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\n" ); document.write( "\n" ); document.write( "You may use 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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\n" ); document.write( "\n" ); document.write( "But if you WILL NOT learn it, you will NEVER solve this problem and will NEVER understand how to solve it.\r
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\n" ); document.write( "\n" ); document.write( "So, the choice is up to you.\r
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