# Question 2.1: In R2, fix the following points O = (1, 0), A1 = (1, 2), A2 ...

In R², fix the following points

O = (1, 0), A_{1} = (1, 2), A_{2} = (0, 1), and

O^{′}= (−1,−1), B_{1} = (0, 0), B_{2} = (2, 3).

Construct the vectorized spaces Σ(O ; A_{1} , A_{2}) and Σ(O^{′}; B_{1} , B_{2}), and then use them to justify the content of (2.4.2).

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