document.write( "Question 28966: 3-2/3x_>1 \n" ); document.write( "
Algebra.Com's Answer #15868 by sdmmadam@yahoo.com(530)![]() ![]() ![]() You can put this solution on YOUR website! 3-2/3x_>1\r \n" ); document.write( "\n" ); document.write( "3-(2/3)X(1/x) >= 1 \n" ); document.write( "(of course x is NOT ZERO here) (as division by zero is not defined) \n" ); document.write( "3-1 >= (2/3)X(1/x) \n" ); document.write( "2 >= (2/3)X(1/x) \n" ); document.write( "1 >= (1/3x) ---(*) \n" ); document.write( "Case 1: Let x >0 \n" ); document.write( "Then multiplying (*) by (x) >0 \n" ); document.write( "(multiplying by a positive quantity does not alter the inequality sign) \n" ); document.write( "(And here greater than remains greater than.) \n" ); document.write( "(1)X(x) >= (1/3x)X(x) \n" ); document.write( " x >= 1/3 \n" ); document.write( "We have got the result x >= 1/3 for our consideration of x >0 \n" ); document.write( "Anything equal to 1/3 or to the right of 1/3 is of course positive. \n" ); document.write( "And as something positive (that is to the right of zero but to the left of 1/3 cannot be >= to 1/3. \n" ); document.write( "So the verdict is x >= 1/3\r \n" ); document.write( "\n" ); document.write( "Case 2: Let x <0 \n" ); document.write( "Then multiplying (*) by (x) < 0 \n" ); document.write( "(multiplying by a negative quantity alters the inequality sign)( \n" ); document.write( "And here greater than becomes less than.) \n" ); document.write( "(1)X(x) =< (1/3x)X(x) \n" ); document.write( " x =< 1/3 \n" ); document.write( "We have got the result x =< 1/3 for our consideration of x < 0 \n" ); document.write( "Anything equal to 1/3 is not negative and anything to the left of 1/3 need not be negative. \n" ); document.write( "And as something negative is always less than 1/3, the verdict is x < 0 \n" ); document.write( "Answer: Either x >=1/3 or x<0\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |