document.write( "Question 1158427: Consider the sequence.\r
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Algebra.Com's Answer #781375 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "4.5, −22.5, 112.5, −562.5, …\r\n" );
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document.write( "Since all those give the same answer, this is a geometric sequence with\r\n" );
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document.write( "first term = a1 = 4.5 and common ratio r = -5.\r\n" );
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document.write( "To get a formula for any term, we use the general formula for the nth term\r\n" );
document.write( "of a geometric sequence, use this\r\n" );
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document.write( "\"matrix%281%2C3%2C%0D%0Aa%5Bn%5D%2C%22%22=%22%22%2Ca%5B1%5Dr%5E%28n-1%29%29\"\r\n" );
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document.write( "To get a formula for the sum of the first n terms, use this:\r\n" );
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document.write( "Edwin
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