Bài 3. Các phép toán tập hợp
Hướng dẫn Giải bài 4 (Trang 15, SGK Toán 10, Tập 1)
<p><strong>C&acirc;u hỏi:</strong> Cho tập hợp A, h&atilde;y x&aacute;c định <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mo>&#8745;</mo><mi>A</mi><mo>,</mo><mo>&#160;</mo><mi>A</mi><mo>&#8746;</mo><mi>A</mi><mo>,</mo><mo>&#160;</mo><mi>A</mi><mo>&#8745;</mo><mo>&#8709;</mo><mo>,</mo><mo>&#160;</mo><mi>A</mi><mo>&#8746;</mo><mo>&#8709;</mo><mo>,</mo><mo>&#160;</mo><msub><mi>C</mi><mi>A</mi></msub><mi>A</mi><mo>,</mo><mo>&#160;</mo><msub><mi>C</mi><mi>A</mi></msub><mo>&#8709;</mo></math></p> <p><strong>Hướng dẫn giải:</strong></p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>+</mo><mo>)</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>&#8745;</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>A</mi><mspace linebreak="newline"/><mo>+</mo><mo>)</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>&#8746;</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>A</mi><mspace linebreak="newline"/><mo>+</mo><mo>)</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>&#8745;</mo><mo>&#8709;</mo><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mo>&#8709;</mo><mspace linebreak="newline"/><mo>+</mo><mo>)</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>&#8746;</mo><mo>&#8709;</mo><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>A</mi><mspace linebreak="newline"/><mo>+</mo><mo>)</mo><mo>&#160;</mo><msub><mi>C</mi><mi>A</mi></msub><mi>A</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>\</mo><mo>&#160;</mo><mi>A</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mo>&#8709;</mo><mspace linebreak="newline"/><mo>+</mo><mo>)</mo><mo>&#160;</mo><msub><mi>C</mi><mi>A</mi></msub><mo>&#8709;</mo><mo>=</mo><mi>A</mi><mo>&#160;</mo><mo>\</mo><mo>&#160;</mo><mo>&#8709;</mo><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>A</mi><mspace linebreak="newline"/></math></p>
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