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Answers for “这个例子中定义域的维度是多少?”

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The kernel is spanned by the vector (1,1,0), and the range is all of the two-dimensional codomain. The nullity is one and the rank is two.

Conditions: The linear map is defined as T(x₁,x₂,x₃)=(x₁−x₂,2x₃).; The domain is three-dimensional and the codomain is two-dimensional.