document.write( "Question 1082980: What are the first four terms of the following sequence: an = (-3)^n for n ≥ 1?\r
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\n" ); document.write( "D) 18, -81, 324, -1215 \n" ); document.write( "

Algebra.Com's Answer #696952 by Edwin McCravy(20059) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "We begin by plugging in 1 for n:\r\n" );
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document.write( "   <-- so the only possible correct choice \r\n" );
document.write( "so far is C, for none of the others have 1st term -3\r\n" );
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document.write( "But to make sure, let's plug in 2 for n:\r\n" );
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document.write( "Uh oh!  Something's wrong!  The second term has to be 9, and\r\n" );
document.write( "none of the choices have 2nd term 9.\r\n" );
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document.write( "Let's see what the correct answer would have to be.\r\n" );
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document.write( "Let's plug in 3 for n:\r\n" );
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document.write( "  \r\n" );
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document.write( "Let's plug in 4 for n:\r\n" );
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document.write( "So the correct answer is\r\n" );
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document.write( "-3, 9, -27, 81\r\n" );
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document.write( "So it's none of those listed.\r\n" );
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document.write( "Edwin

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