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Suppose f : R^2 rightarrow R^2 is defined by f(x1,x2) = (-2x2,x1). a) is f one-to-one?...

Suppose f : R^2 rightarrow R^2 is defined by f(x1,x2) = (-2x2,x1). a) is f one-to-one? b) is f onto? Dont show in matrix form.

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