document.write( "Question 983042: The number of the sequence is 17,if the second number is 3,what is the first number?
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Algebra.Com's Answer #603853 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
Just taking a guess, you have common difference of 17 as \"number of the sequence\". Term at index 2 is 3. If common difference is 17, assuming going forward, then going backward to index 1, you subtract 17 from 3:\r
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