document.write( "Question 984929: 3, -6, 12, 4, 20, WHATS NEXT \n" ); document.write( "
Algebra.Com's Answer #605770 by rothauserc(4718)\"\" \"About 
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3, -6, 12, 4, 20,
\n" ); document.write( "look at the differences to discover the pattern
\n" ); document.write( "-9, 18, -8, 16,
\n" ); document.write( "the next difference is -7, therefore
\n" ); document.write( "20 - 7 = 13
\n" ); document.write( "13 is the next number in the sequence
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