I cannot seem to figure out how to compute this dot product?!(adsbygoogle = window.adsbygoogle || []).push({});

If [itex](\nabla\times \mathbf{v})=(4z^2-2x)\hat{i}+2z\hat{k}[/itex] and [itex]d\mathbf{a}=dydz\hat{i}[/itex]

Then shouldn't the DOT PODUCT be:

[itex](\nabla\times \mathbf{v})\cdot d\mathbf{a}=(4z^2-2x)\hat{i}*dydz\hat{i}=(4z^2-2x)dydz[/itex] ???

But the book says its just [itex]4z^2dydz[/itex]

What am I doing wrong here??

Here is the original question:

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# Homework Help: Dot Product Question

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