document.write( "Question 991041: What is first number of the sequence if the last number is 17 and second number is 3. \n" ); document.write( "
Algebra.Com's Answer #610953 by farohw(175)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "If the second number is 3 and the last is 17 then the pattern is: multiply each number by 2 then subtract 1.\r
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\n" ); document.write( "\n" ); document.write( "2, 3, 5, 9, 17\r
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\n" ); document.write( "\n" ); document.write( "So the first number of the sequence is 2.
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