Bài 7. Các khái niệm mở đầu
Hướng dẫn Giải Bài 4.4 (Trang 50 SGK Toán 10, Bộ Kết nối tri thức, Tập 1)
<p><strong>B&agrave;i 4.4 (Trang 50 SGK To&aacute;n 10, Bộ Kết nối tri thức, Tập 1)</strong></p> <p>Cho h&igrave;nh vu&ocirc;ng ABCD c&oacute; hai đường ch&eacute;o cắt nhau tại O. H&atilde;y chỉ ra tập S gồm tất cả c&aacute;c vecto kh&aacute;c&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mover><mn>0</mn><mo>&#8594;</mo></mover></math>, c&oacute; điểm đầu v&agrave; điểm cuối thuộc tập hợp {A; B; C; D; O}. H&atilde;y chia tập S th&agrave;nh c&aacute;c nh&oacute;m sao cho hai vecto thuộc c&ugrave;ng một nh&oacute;m khi v&agrave; chỉ khi ch&uacute;ng bằng nhau.</p> <p>&nbsp;</p> <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 l&agrave;:</p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>S</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>B</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>A</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>A</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>A</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover><mo>&#160;</mo><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>B</mi><mi>A</mi><mo>;</mo></mrow><mo>&#8594;</mo></mover><mo>&#160;</mo><mover><mrow><mi>B</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>B</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>B</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>A</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>B</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>O</mi><mo>&#160;</mo></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>D</mi><mi>A</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>D</mi><mi>B</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>D</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>D</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>O</mi><mi>A</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>O</mi><mi>B</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>O</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mover><mrow><mi>O</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced></math></p> <p>C&aacute;c nh&oacute;m trong S l&agrave;:&nbsp;</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>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>D</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>B</mi><mi>A</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>B</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>D</mi><mi>A</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>B</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mspace linebreak="newline"/><mfenced open="{" close="}"><mrow><mover><mrow><mi>A</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>O</mi><mi>C</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>O</mi><mi>A</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>C</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>O</mi><mi>B</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>D</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>,</mo><mo>&#160;</mo><mfenced open="{" close="}"><mrow><mover><mrow><mi>B</mi><mi>O</mi></mrow><mo>&#8594;</mo></mover><mo>;</mo><mo>&#160;</mo><mover><mrow><mi>O</mi><mi>D</mi></mrow><mo>&#8594;</mo></mover></mrow></mfenced><mo>.</mo></math></p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p>
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