document.write( "Question 1059284: I need to make up a rational function that has the following characteristics : crosses the x-axis at 3; touches the x-axis at -2;, has a vertical asymptote at x=1 and at x=-4; has a hole at x=5; and has a horizontal asymptote at y=2 \n" ); document.write( "
Algebra.Com's Answer #674351 by josgarithmetic(39623)![]() ![]() ![]() You can put this solution on YOUR website! NOTE: Because of the \"touch at x=-2\" part of the description, another tutor may need to discuss this exercise for a better solution.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Only some GUIDANCE...\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The numerator may control all your x-intercepts. Having a horizontal asymtptote means degree of numerator and degree of denominator are the same. Your vertical asymptotes tell you where along the x-axis the \"roots\" for the numerator are.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "That should help you very much.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "--According to your personal note, the guidance above was not clear enough for you or you did not seem ready for that guidance.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Look at the specifications for your rational function: \n" ); document.write( "------------------------------------------------- \n" ); document.write( "Zeros at x for 3 and -2 \n" ); document.write( "Vertical asymptotes at x for 1 and -4 \n" ); document.write( "Hole at x=5 \n" ); document.write( "Horizontal asymptote for y=2 \n" ); document.write( "-------------------------------------------------\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Two things may stand out to you right-away. \n" ); document.write( "Horizontal Asymptote, telling you degree of numerator and denominator are same; and the hole and the vertical asymptotes tell you three x-values for which the function is undefined.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Give the function a factor, k.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "Look and see that: \n" ); document.write( "(*) Degree of numerator and denominator are equal. \n" ); document.write( "(*) \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Good so far?\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Degree of numerator is 3 and degree of denominator is ALSO 3. \n" ); document.write( "Formula for y contains the factor \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A minor simplification of the formula:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Notice this also written to account for the two zeros at x=3 and x=-2.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The horizontal asymptote: \n" ); document.write( "Need y=2 when x goes unbound toward either negative or positive infinity.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "Note that this solution attempt may still be incomplete, because I am unsure how to establish that y crosses x-axis at 3 but TOUCHES the x-axis at -2. Another tutor may need to help with finishing for that.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " |