document.write( "Question 1070726: The 9th term and 6th term of geometric are 80 and 10.(a)find the 1st term and constant ratio.(b)find the number of terms if the last term is 5120. \n" ); document.write( "
Algebra.Com's Answer #685813 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
__, __, __, __, __, 80, __, __, 10\r\n" );
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document.write( "__, __, __, __, __, 80,80r,80r²,8r³=10\r\n" );
document.write( "                                 r³=10/80\r\n" );
document.write( "                                 r³=1/8\r\n" );
document.write( "                                  r=\"1%2F2\"\r\n" );
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document.write( "\"a%5Bn%5D\"\"%22%22=%22%22\"\"a%5B1%5Dr%5E%28n-1%29\"\r\n" );
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document.write( "\"a%5B6%5D\"\"%22%22=%22%22\"\"a%5B1%5D%281%2F2%29%5E%286-1%29\"\r\n" );
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document.write( "\"80\"\"%22%22=%22%22\"\"a%5B1%5D%281%2F2%29%5E5\"\r\n" );
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document.write( "\"80\"\"%22%22=%22%22\"\"a%5B1%5D%281%2F32%29\"\r\n" );
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document.write( "\"2560\"\"%22%22=%22%22\"\"a%5B1%5D\"\r\n" );
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document.write( "Edwin
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