document.write( "Question 339036: For which of the following values of N is 3N – 1 not a prime number?\r
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document.write( "(a) 1 (b) 2 (c) 3 (d) 4 (e) 6 \n" );
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Algebra.Com's Answer #243374 by nyc_function(2741)![]() ![]() You can put this solution on YOUR website! A prime number can be divided, without a remainder, only by itself and by 1. For example, 17 can be divided only by 17 and by 1. \n" ); document.write( "The only even prime number is 2. All other even numbers can be divided by 2. \r \n" ); document.write( "\n" ); document.write( "We must replace N by every number on the list to find the one that does not yield a prime number. \r \n" ); document.write( "\n" ); document.write( "Let N = 1, 2, 3, 4 and 6 individually in the given expression and simplify. \n" ); document.write( "3N - 1 \n" ); document.write( "3(1) - 1 = 3 - 1 = 2...That's not it. \n" ); document.write( "3N - 1 \n" ); document.write( "3(2) - 1 = 6 - 1 = 5...That's not it. \n" ); document.write( "3N - 1 \n" ); document.write( "3(3) - 1 = 9 - 1 = 8...This is it! There is no need to go further with the process. \n" ); document.write( "Understood? \n" ); document.write( "The answer is CHOICE (C). \n" ); document.write( " \n" ); document.write( " |