Bài 4. Hai mặt phẳng song song
Hướng dẫn giải Hoạt động 1 (Trang 64 SGK Toán Hình học 11)
<p><strong class="content_question">Đề b&agrave;i</strong></p> <p>Cho hai mặt phẳng song song <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#945;</mi></mfenced></math>&nbsp;v&agrave; <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#946;</mi></mfenced></math>. Đường thẳng <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi></math> nằm trong&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#945;</mi></mfenced></math> &nbsp;(h.2.47). Hỏi <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi></math>&nbsp;v&agrave; <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#946;</mi></mfenced></math>&nbsp;c&oacute; điểm</p> <p>chung kh&ocirc;ng?</p> <p><img src="https://img.loigiaihay.com/picture/2018/0915/tra-loi-cau-hoi-toan-11-hinh-hoc-bai-4-trang-64.PNG" alt="" width="244" height="228" /></p> <p><strong class="content_detail">Lời giải chi tiết</strong></p> <p>Hai mặt phẳng song song <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#945;</mi></mfenced></math>&nbsp;v&agrave; <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#946;</mi></mfenced></math> <math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#8658;</mo><mfenced><mi>&#945;</mi></mfenced></math> v&agrave; <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#946;</mi></mfenced></math>&nbsp;kh&ocirc;ng c&oacute; điểm chung</p> <p>Đường thẳng <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi></math>&nbsp;nằm trong <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#945;</mi></mfenced></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#8658;</mo></math>&nbsp;Đường thẳng <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi></math>&nbsp;kh&ocirc;ng nằm trong&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#946;</mi></mfenced></math></p> <p>Vậy <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>d</mi></math>&nbsp;v&agrave; <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mi>&#946;</mi></mfenced></math>&nbsp;kh&ocirc;ng c&oacute; điểm chung.</p>
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