Bài 3: Bất Phương Trình Một Ẩn
Hướng dẫn giải Bài 16 (Trang 43 SGK Toán Đại số 8, Tập 2)
<p>Viết v&agrave; biểu diễn tập nghiệm tr&ecirc;n trục số của mỗi bất phương tr&igrave;nh sau:</p> <p>a) x&lt;4<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span>b) x<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#8804;</mo></math>-2<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span>c) x&gt;-3<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span>d) x<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#8805;</mo></math>1</p> <p><em><strong>Hướng dẫn:</strong></em></p> <p>a) {x/ x&lt;4} <span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/12032022/screenshot-2022-03-12-085852-TbSJdO.png" /></p> <p>b) {x/ x&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#8804;</mo></math>-2}<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/12032022/screenshot-2022-03-12-085957-XyNKuN.png" /></p> <p>c) {x/ x&gt;-3}<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/12032022/screenshot-2022-03-12-090044-Q2sLkZ.png" /></p> <p>d) {x/ x<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#8805;</mo></math>1}<span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><span class="mce-nbsp-wrap" contenteditable="false">&nbsp;&nbsp;&nbsp;</span><img class="wscnph" style="max-width: 100%;" src="https://static.colearn.vn:8413/v1.0/upload/library/12032022/screenshot-2022-03-12-090144-8fsTtb.png" /></p>
Hướng dẫn Giải Bài 16 (trang 43, SGK Toán 8, Tập 2, Phần Đại số)
GV: GV colearn
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Hướng dẫn Giải Bài 16 (trang 43, SGK Toán 8, Tập 2, Phần Đại số)
GV: GV colearn