document.write( "Question 1104418: The first two terms of an infinite geometric sequence, in order, are 2log2x, log2x, where x > 0.
\n" ); document.write( " found that r = 1/2.
\n" ); document.write( "how can I find that the sum of the infinite sequence is 4log2x? \n" ); document.write( "

Algebra.Com's Answer #719159 by Boreal(15235) $\"\"$ $\"About$

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Sum is a(1-r^n)/(1-r), and r is 1/2, where a is 2 log 2x. As n gets large, r^n approaches 0.
\n" ); document.write( "sum is 2log 2x(1/(1/2))=4 log 2x
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