CALC III: plans 2-3 D : Explain the difference between X=2 in 2-dimensions and X=2 in 3-dimensions?

Question

Explain the difference between X=2 in 2-dimensions and X=2 in 3-dimensions

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Answer 1

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In 2-dimensions, X=2 is a vertical straight line on the XY plane. For any value of Y, X is always 2.

In 3-dimensions, X=2 is a plane located at X=2 parallel to the YZ plane. For any value of Y and Z, X is always 2.