document.write( "Question 1120724: 3, -6, 12, 4, 20, \n" ); document.write( "
Algebra.Com's Answer #736419 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "The answer to every question like this is the same:

\n" ); document.write( "It is impossible to know what the \"right\" answer is; any next number(s) will form a valid sequence.
\n" ); document.write( "
\n" );