Question

Let ?(?, ?, ?) = 2???? + (? 3 + ? 3 )? − 3? 2?...

Let ?(?, ?, ?) = 2???? + (? 3 + ? 3 )? − 3? 2? ?,

(?) Find div ? at (1, 2, −1).

(?) Find curl ?. Is ? irrotational?

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