) Ted, Robyn, Barney, Marshall, Lily, Stella, Victoria, Tracy, Karen, and Holli line up for a picture. Ho many ways can this happen if Ted, Barney and Robyn must be separated?

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A: Topic:- application of trigonometry

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A: partial derivatives

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A: To sketch the region of the integration.

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A: I am attaching image so that you understand each and every step.

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Q: dx (4+x²)² √

A: Explained below