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Need help 2 Zero Set Let f : R2 - R be the function: f (x, y) = 22 -32 Define: Z(f) = { (x,

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2 Zero Set Let f : R2 - R be the function: f (x, y) = 22 -32 Define: Z(f) = { (x, y) ER2 : f(x, y) = 0} Prove that Z (f ) is not a subspace of R2. Proof

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