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PLEASE SHOW ALL THE WORK!!! AND STEP BY STEP THE PROCESS Using the unit vectors of a Cartesian coordinate system, prove the following useful identities:

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PLEASE SHOW ALL THE WORK!!! AND STEP BY STEP THE PROCESS

Using the unit vectors of a Cartesian coordinate system, prove the following useful identities: a- div(v)=v+divv b- divvw=vw+divwv c- divv=:v+vdiv Hint: use the product rule for the differentiation: x(fg)=gxf+fxg

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