document.write( "Question 1172363: the 8th term of a G.P is 640.if the first term is 5,find the common ratio and the 10th term \n" ); document.write( "

Algebra.Com's Answer #797383 by ikleyn(52790) $\"\"$ $\"About$

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document.write( "The ratio    is equal to   = 128 = .\r\n" );
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document.write( "From the other hand side, the ratio    is  .\r\n" );
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document.write( "Therefore,  r = 2 (the common ratio).\r\n" );
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document.write( "Hence,   =  = 5*512 = 2560.\r\n" );
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