document.write( "Question 983763: what would be the number in the blank space below?
\n" ); document.write( "1 8 17 30 _ 76 \n" ); document.write( "

Algebra.Com's Answer #604572 by solver91311(24713) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "                  1   8   17    30    __    76\r\n" );
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document.write( "Differences         7   9    13   __     __\r\n" );
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document.write( "Diff of Diff          2    4   \r\n" );
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document.write( "Diff of diff of diff     2   \r\n" );
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document.write( "Presuming the difference of the differences of the differences is constant, and then working back UP the table:\r\n" );
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document.write( "                  1   8   17    30    49    76\r\n" );
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document.write( "Differences         7   9    13   19    27\r\n" );
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document.write( "Diff of Diff          2    4    6    8   \r\n" );
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document.write( "Diff of diff of diff     2   2    2\r\n" );
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it\r
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