document.write( "Question 446548: differentiate:
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Algebra.Com's Answer #307713 by robertb(5830)\"\" \"About 
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a) \"3%2Fx+=+3x%5E%28-1%29\" ==> derivative is \"3%2A%28-1%29%2Ax%5E%28-2%29+=+-3x%5E%28-2%29\".\r
\n" ); document.write( "\n" ); document.write( "b) \"2%2A%281%2F%282sqrt%28x%29%29%29+=+1%2Fsqrt%28x%29\"\r
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\n" ); document.write( "\n" ); document.write( "c) \"1%2Fsqrt%28x%29+=+x%5E%28-1%2F2%29\" ==> derivative is
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