document.write( "Question 1019710: |x|>k is equivalent to? \n" ); document.write( "
Algebra.Com's Answer #635651 by Theo(13342)![]() ![]() You can put this solution on YOUR website! i believe the answer is going to be x < -k and x > k\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "here's how to figure.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "start with abs(x) > k\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "abs(x) means the same as |x| which means absolute value of x.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so start with abs(x) > k.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "now abs(x) is equal to x if x > 0 and abs (x) is equal to -x if x < 0.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "therefore:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "abs(x) > k can be broken up into two equations, one where x is greater than 0 and one where x is smaller than 0.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "you get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-x > k when x is smaller than 0, and x > k when x is greater than 0.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when x is smaller than 0, the equation of -x > k is solved for x as follows:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "start with -x > k \n" ); document.write( "multiply both sides of this equation by -1 to get x < -k. \n" ); document.write( "when you multiply both sides of an inequality by a negative number, the inequality reverses. \n" ); document.write( "so, when x < 0, you get x < -k.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when x is greater than 0, the equation of x > k is solved for x as follows:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "start with x > k \n" ); document.write( "you're done since the equation has already been solved.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so you have x < -k or x > k.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "in interval notation, this solution would be shown as (-infinity,-k) union (k,infinity).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if you were able to graph this inequality, you would get a graph that looks like this:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " ![]() \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |