document.write( "Question 995798: Find the differential of each function. y = (2-v^2)/(2 + v^2) \n" ); document.write( "
Algebra.Com's Answer #614461 by ikleyn(52786)\"\" \"About 
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\n" ); document.write( "y = \"p%2Fq\",\r
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\n" ); document.write( "\n" ); document.write( "where  p  and  q  are functions of  x.\r
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\n" ); document.write( "\n" ); document.write( "The formula for the differential of a quotient is \r
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\n" ); document.write( "\n" ); document.write( "dy = \"%28dp%2Aq+-+p%2Adq%29%2Fq%5E2\".               (1)\r
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\n" ); document.write( "\n" ); document.write( "You should know this formula.  In our case \r
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\n" ); document.write( "\n" ); document.write( "p = \"2-v%5E2\", q = \"2%2Bv%5E2\".         (2)\r
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\n" ); document.write( "\n" ); document.write( "So,  express now  dp  and  dq  based on formulas  (2)  and then substitute it into  (1).\r
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