document.write( "Question 124614This question is from textbook
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document.write( ": Would someone be able to help me with this problem?
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document.write( "The solution to the inequality x^3-4x^2-x+4(
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document.write( "a.[1,4]
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document.write( "b.(-infinity,-1]U[1,4]
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document.write( "c.[4,infinity)
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document.write( "d.[-1,1]U[4,infinity)
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document.write( "I thought the answer was a.,is this correct? Please help as soon as possible!!!
Algebra.Com's Answer #91350 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! The solution to the inequality x^3-4x^2-x+4( \n" ); document.write( "(x+1)(x-1)(x-4)<=0 \n" ); document.write( "The zeroes are x = -1, x=1, x=4 \n" ); document.write( "Draw a number line; Plot those x-values. \n" ); document.write( "Test a point in each of the resulting intervals to see where the solutions are. \n" ); document.write( "----------------------- \n" ); document.write( "If x=-2 you get: (-)(-)(-) < 0 ; true, solutions in (-inf,-1} \n" ); document.write( "Since only \"b\" contains that information, check x=2 \n" ); document.write( "If x = 2 you get: (+)(+)(-) <0; true, solutions in [1,4] \n" ); document.write( "----------------- \n" ); document.write( "Ans: \"b\" \n" ); document.write( "-------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------------------ \n" ); document.write( "My answer options are: \n" ); document.write( "a.[1,4] \n" ); document.write( "b.(-infinity,-1]U[1,4] \n" ); document.write( "c.[4,infinity) \n" ); document.write( "d.[-1,1]U[4,infinity) \n" ); document.write( "I thought the answer was a.,is this correct? \n" ); document.write( " |