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Old 02-22-2010   #4
jmw106462

 
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1. a. phi(x,y,z) = (x^2)(y^3)(z^4) - 3(x)(y^2)
grad (phi) =
(2(y^3)(z^4)(x) - 3(y^2), 3(x^2)(z^4)(y^2) - 6xy, 4(x^2)(y^3)(z^3))

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