document.write( "Question 1076020: Write the following series in summation notation please?
\n" ); document.write( "12+6+3+1.5+0.75 \n" ); document.write( "

Algebra.Com's Answer #690703 by KMST(5328) $\"\"$ $\"About$

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It's obviously the sum of a geometric sequence with first term 12 and common ratio 0.5=1/2.
\n" ); document.write( "The general expression for term number $\"k\"$ is
\n" ); document.write( " $\"12%2A%281%2F2%29%5E%28k-1%29\"$ .
\n" ); document.write( "The sum of the 5 terms shown can be written as
\n" ); document.write( " $\"sum%2812%2F2%5E%28k-1%29%2Ck=1%2Ck=5%29\"$ \n" ); document.write( "

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