Bài 5: Bảng căn bậc hai
Hướng dẫn Giải Bài 41 (Trang 23 SGK Toán 9, Tập 1)
<div data-v-4ef816dc=""><strong>B&agrave;i 41 (Trang 23 SGK To&aacute;n 9, Tập 1):</strong></div> <p>Biết&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>9</mn><mo>,</mo><mn>119</mn></msqrt><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>3</mn><mo>,</mo><mn>019</mn></math>. H&atilde;y t&iacute;nh:</p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>911</mn><mo>,</mo><mn>9</mn></msqrt></math>;<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><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>91190</mn></msqrt></math>;<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><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>0</mn><mo>,</mo><mn>09119</mn></msqrt></math>;<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><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>0</mn><mo>,</mo><mn>0009119</mn></msqrt></math>.</p> <p>&nbsp;</p> <p><strong><span style="text-decoration: underline;"><em>Hướng dẫn giải:</em></span></strong></p> <p><strong><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>911</mn><mo>,</mo><mn>9</mn></msqrt><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><msqrt><mn>9</mn><mo>,</mo><mn>119</mn></msqrt><mo>&#160;</mo><mo>.</mo><mo>&#160;</mo><msqrt><mn>100</mn></msqrt><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>3</mn><mo>,</mo><mn>019</mn><mo>&#160;</mo><mo>.</mo><mo>&#160;</mo><mn>10</mn><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>30</mn><mo>,</mo><mn>19</mn><mo>;</mo></math></strong></p> <p><strong><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>91190</mn></msqrt><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><msqrt><mn>9</mn><mo>,</mo><mn>119</mn></msqrt><mo>&#160;</mo><mo>.</mo><mo>&#160;</mo><msqrt><mn>10000</mn></msqrt><mo>&#160;</mo><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>3</mn><mo>,</mo><mn>019</mn><mo>.</mo><mn>100</mn><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>301</mn><mo>,</mo><mn>9</mn><mo>;</mo></math></strong></p> <p><strong><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>0</mn><mo>,</mo><mn>09119</mn></msqrt><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><msqrt><mn>9</mn><mo>,</mo><mn>119</mn></msqrt><mo>.</mo><msqrt><mn>0</mn><mo>,</mo><mn>01</mn></msqrt><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>3</mn><mo>,</mo><mn>019</mn><mo>.</mo><mn>0</mn><mo>,</mo><mn>1</mn><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>0</mn><mo>,</mo><mn>3019</mn><mo>;</mo></math></strong></p> <p><strong><math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mn>0</mn><mo>,</mo><mn>0009119</mn></msqrt><mo>&#160;</mo><mo>=</mo><msqrt><mn>9</mn><mo>,</mo><mn>119</mn></msqrt><mo>&#160;</mo><mo>.</mo><mo>&#160;</mo><msqrt><mn>0</mn><mo>,</mo><mn>0001</mn></msqrt><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>3</mn><mo>,</mo><mn>019</mn><mo>&#160;</mo><mo>.</mo><mo>&#160;</mo><mn>0</mn><mo>,</mo><mn>01</mn><mo>&#160;</mo><mo>&#8776;</mo><mo>&#160;</mo><mn>0</mn><mo>,</mo><mn>03019</mn><mo>.</mo></math></strong></p>
Hướng dẫn Giải Bài 41 (trang 23, SGK Toán 9, Tập 1)
GV: GV colearn
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Hướng dẫn Giải Bài 41 (trang 23, SGK Toán 9, Tập 1)
GV: GV colearn