document.write( "Question 1204431: Determine whether 280 is a term in the G.P 1,3,9,27… \n" ); document.write( "
Algebra.Com's Answer #840673 by josgarithmetic(39618)\"\" \"About 
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Obviously not. Starting with 3, and then only powers of 3, and you know by LOOKING at 280, this is not a power of 3.\r
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\n" ); document.write( "\n" ); document.write( "In case you did not know or forgot, beginning with 3, any and all powers of 3 will have sum of the digits being equal to a multiple of 3.
\n" ); document.write( "Look at 280.
\n" ); document.write( "find sum of 2+8+0.
\n" ); document.write( "That sum is 10.
\n" ); document.write( "10 is very obviously not a multiple of 3.
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