document.write( "Question 63740: Could someone please help?\r
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document.write( "Use Descartes' Rule of Signs to find the number of possible number of positive zeros and the possible number of negative zeros of Q(x)=x^42x^3+4x^2-3x-2.\r
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document.write( "Find the horizontal and vertical asymptotes of the function f(x)=x^2+3x-2/x-4 \n" );
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Algebra.Com's Answer #46288 by venugopalramana(3286) You can put this solution on YOUR website! SEE THE FOLLOWING EXAMPLE AND TRY.. \n" ); document.write( "Using Descartes Rule of Signs to determine how many \n" ); document.write( "positive and how many negative real zeros the \n" ); document.write( "polynomial functions may have. Do not attempt to find \n" ); document.write( "the zeros. \n" ); document.write( "f(x)=x^6-4x^5-x^4-3x^3+3x^2+x+4 \n" ); document.write( "Thank You. \n" ); document.write( "TO FIND NUMBER OF POSSIBLE POSITIVE ROOTS.. \n" ); document.write( "1.WRITE F(X) IN DESCENDING ORDER.. \n" ); document.write( "IT IS ALREADY WRITTEN HERE. \n" ); document.write( "2.FIND NUMBER OF CHANGES IN SIGNS OF COEFFICIENTS OF \n" ); document.write( "TERMS OF F(X).. \n" ); document.write( "THERE ARE 2 CHANGES ...+1X^6 TO -4X^5...AND...-3X^3 TO \n" ); document.write( "+3X^2. \n" ); document.write( "HENCE THERE WILL BE A MAXIMUM OF 2 POSITIVE ROOTS. \n" ); document.write( "NEXT TO FIND THE NUMBER OF POSSIBLE NEGATIVE ROOTS.. \n" ); document.write( "1.WRITE F(-X) IN DESCENDING ORDER.. \n" ); document.write( "IT IS ... \n" ); document.write( "F(-X)= X^6+4X^5-X^4+3X^3+3X^2-X+4 \n" ); document.write( "2.FIND NUMBER OF CHANGES IN SIGNS OF COEFFICIENTS OF \n" ); document.write( "TERMS OF F(-X).. \n" ); document.write( "THERE ARE 3 CHANGES ...+4X^5 TO -X^4...AND...-X^4 TO \n" ); document.write( "+3X^3....AND \n" ); document.write( "+3X^2 TO -X \n" ); document.write( "HENCE THERE WILL BE A MAXIMUM OF 3 NEGATIVE ROOTS. \n" ); document.write( "=============================================================================\r \n" ); document.write( "\n" ); document.write( "Find the horizontal and vertical asymptotes of the function f(x)=x^2+3x-2/x-4 \n" ); document.write( "HOPE YOU MEAN ... f(x)=(x^2+3x-2)/(x-4)..IF YOU DONT PUT BRACKETS IT MAY MEAN ANY THING LIKE.....f(x)=x^2+3x-[2/x]-4..ETC..ANY WAY TAKING AS MENTIONED \n" ); document.write( " F(X) = Y = (X-2)(X-1)/(X-4) \n" ); document.write( "VERTICAL ASYMPTOTE... \n" ); document.write( "FIND WHEN Y WILL TEND TO INFINITY? \n" ); document.write( "AS X TENDS TO 4 , Y TENDS TO INFINITY. HENCE X-4=0...OR...X=4 IS THE VERTICAL ASYMPTOTE. \n" ); document.write( "HORIZONTAL ASYMPTOTE... \n" ); document.write( "FIND WHETHER Y WILL TEND TO A FINITE LIMIT WHEN X TENDS TO + OR - INFINITY? \n" ); document.write( "WE FIND THAT Y TENDS TO INFINITY AS X TENDS TO INFINITY ..HENCE THERE \n" ); document.write( "ARE NO HORIZONTAL ASYMPTOTES\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |