document.write( "Question 398844: i need help for finding the interval of increase and decrease for rational function \n" ); document.write( "
Algebra.Com's Answer #282515 by richard1234(7193)\"\" \"About 
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Given a rational function \"y+=+p%28x%29%2Fq%28x%29\", the derivative of y is given by\r
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\n" ); document.write( "\n" ); document.write( " (by the quotient rule)\r
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\n" ); document.write( "\n" ); document.write( "Set it equal to zero to find all critical points, then you can replace values of x between those critical points to determine whether the function is increasing or decreasing. Note that the function is undefined when \"q%28x%29+=+0\".
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