If = x1x2 dx1 dx2 + x2x3 dx1 dx3 + x1x3 dx2 dx3, then d = 2x3 dx1 dx2 dx3
Chapter 8, Problem 18(choose chapter or problem)
If = x1x2 dx1 dx2 + x2x3 dx1 dx3 + x1x3 dx2 dx3, then d = 2x3 dx1 dx2 dx3.
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