Hướng dẫn Giải Bài 4.4 (Trang 50 SGK Toán 10, Bộ Kết nối tri thức, Tập 1)
<p><strong>Bài 4.4 (Trang 50 SGK Toán 10, Bộ Kết nối tri thức, Tập 1)</strong></p>
<p>Cho hình vuông ABCD có hai đường chéo cắt nhau tại O. Hãy chỉ ra tập S gồm tất cả các vecto khác <math xmlns="http://www.w3.org/1998/Math/MathML"><mover><mn>0</mn><mo>→</mo></mover></math>, có điểm đầu và điểm cuối thuộc tập hợp {A; B; C; D; O}. Hãy chia tập S thành các nhóm sao cho hai vecto thuộc cùng một nhóm khi và chỉ khi chúng bằng nhau.</p>
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<p><em><span style="text-decoration: underline;"><strong>Hướng dẫn giải</strong></span></em></p>
<p><img class="wscnph" style="max-width: 100%; display: block; margin-left: auto; margin-right: auto;" src="https://static.colearn.vn:8413/v1.0/upload/library/17102022/bai-4-4-trand-50-toan-lop-10-tap-1-UPxnnX.png" /></p>
<p>Tập S là:</p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>S</mi><mo> </mo><mo>=</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>B</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>A</mi><mi>C</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>A</mi><mi>D</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>A</mi><mi>O</mi></mrow><mo>→</mo></mover><mo> </mo><mo>;</mo><mo> </mo><mover><mrow><mi>B</mi><mi>A</mi><mo>;</mo></mrow><mo>→</mo></mover><mo> </mo><mover><mrow><mi>B</mi><mi>C</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>B</mi><mi>D</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>B</mi><mi>O</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>A</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>B</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>D</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>O</mi><mo> </mo></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>D</mi><mi>A</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>D</mi><mi>B</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>D</mi><mi>C</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>D</mi><mi>O</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>O</mi><mi>A</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>O</mi><mi>B</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>O</mi><mi>C</mi></mrow><mo>→</mo></mover><mo>;</mo><mover><mrow><mi>O</mi><mi>D</mi></mrow><mo>→</mo></mover></mrow></mfenced></math></p>
<p>Các nhóm trong S là: </p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>B</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>D</mi><mi>C</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>B</mi><mi>A</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>D</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>D</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>B</mi><mi>C</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>D</mi><mi>A</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>B</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mspace linebreak="newline"/><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>O</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>O</mi><mi>C</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>O</mi><mi>A</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>C</mi><mi>O</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>O</mi><mi>B</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>D</mi><mi>O</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>,</mo><mo> </mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>B</mi><mi>O</mi></mrow><mo>→</mo></mover><mo>;</mo><mo> </mo><mover><mrow><mi>O</mi><mi>D</mi></mrow><mo>→</mo></mover></mrow></mfenced><mo>.</mo></math></p>
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