document.write( "Question 1147484: Give an example of a function which is differentiable at all points except 1,2,3. \n" ); document.write( "

Algebra.Com's Answer #768809 by ikleyn(52782) $\"\"$ $\"About$

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document.write( "A good, standard and typical example is the function\r\n" );
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document.write( "    y(x) = |x-1| + |x-2| + |x-3|,\r\n" );
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document.write( "the sum of the three absolute value functions of three linear binomials.\r\n" );
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document.write( "The plot of the function is below.\r\n" );
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document.write( "    \r\n" );
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document.write( "    Plot y = |x-1| + |x-2| + |x-3|.\r\n" );
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