document.write( "Question 392757: What is the fifth term in the geometric sequence which begins 2, - 1, 1/2?
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Algebra.Com's Answer #278787 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi
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document.write( " geometric sequence { 2, - 1, 1/2...} r = -(1/2)
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document.write( "\"a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28n-1%29\"
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document.write( "Note: \"a%5B3%5D+=+2%2Ar%28-1%2F2%29%5E2\" = 2/4 = 1/2\r
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document.write( "\"a%5B5%5D+=+2%2A%28-1%2F2%29%5E%284%29+=+2%2F16+\" =  1/8 \n" );
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