document.write( "Question 1198089: Show that the terms of the series ∑n r=1 log 5r are in AP. Hence, find the sum of the first twenty terms of the series and also the least value of n for which the sum to n terms exceeds 400.[ans: S20 = 146.78, n = 34] \n" ); document.write( "
Algebra.Com's Answer #831662 by ikleyn(52794)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "                    To the next generation of students,  who will read this post.\r
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\n" ); document.write( "\n" ); document.write( "Simply ignore it and do not waste your time,  since the post is mathematically unreadable, \r
\n" ); document.write( "\n" ); document.write( "mathematically incorrect and mathematically non-sensical.\r
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