Bài 9: Căn bậc ba
Hướng dẫn giải Bài 69 (Trang 36 SGK Toán 9, Tập 1)
<p><strong>B&agrave;i 69 (trang 36, SGK To&aacute;n 9, Tập 1):</strong></p> <p>So s&aacute;nh&nbsp;</p> <p>a) 5 v&agrave; <math xmlns="http://www.w3.org/1998/Math/MathML"><mroot><mn>123</mn><mn>3</mn></mroot></math></p> <p>b)&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>5</mn><mroot><mn>6</mn><mn>3</mn></mroot></math> v&agrave;&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><mroot><mn>5</mn><mn>3</mn></mroot></math></p> <p>&nbsp;</p> <p><strong><span style="text-decoration: underline;"><em>Hướng dẫn giải:</em></span></strong></p> <p>a) <math xmlns="http://www.w3.org/1998/Math/MathML"><mn>5</mn><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><msup><mn>5</mn><mn>3</mn></msup><mn>3</mn></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mn>125</mn><mn>3</mn></mroot><mo>&#160;</mo><mo>&#62;</mo><mo>&#160;</mo><mroot><mn>123</mn><mn>3</mn></mroot><mo>.</mo></math></p> <p>b)&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>5</mn><mroot><mn>6</mn><mn>3</mn></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mrow><mn>125</mn><mo>&#160;</mo></mrow><mn>3</mn></mroot><mo>.</mo><mroot><mn>6</mn><mrow><mo>&#160;</mo><mn>3</mn></mrow></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mrow><mn>125</mn><mo>.</mo><mn>6</mn></mrow><mn>3</mn></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mn>750</mn><mn>3</mn></mroot><mo>;</mo></math></p> <p>&nbsp; &nbsp;&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>6</mn><mroot><mn>5</mn><mn>3</mn></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mn>216</mn><mn>3</mn></mroot><mo>.</mo><mroot><mn>5</mn><mn>3</mn></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mrow><mn>216</mn><mo>.</mo><mn>5</mn></mrow><mn>3</mn></mroot><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mroot><mn>1080</mn><mn>3</mn></mroot><mo>;</mo></math></p> <p>Ta c&oacute;&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mroot><mn>750</mn><mn>3</mn></mroot><mo>&#160;</mo><mo>&#60;</mo><mo>&#160;</mo><mroot><mn>1080</mn><mn>3</mn></mroot><mo>&#160;</mo><mi>n</mi><mi>&#234;</mi><mi>n</mi><mo>&#160;</mo><mn>5</mn><mo>.</mo><mroot><mn>6</mn><mn>3</mn></mroot><mo>&#160;</mo><mo>&#60;</mo><mo>&#160;</mo><mn>6</mn><mo>.</mo><mroot><mn>5</mn><mn>3</mn></mroot></math></p>
Hướng dẫn Giải Bài 69 (trang 36, SGK Toán 9, Tập 1)
GV: GV colearn
Xem lời giải bài tập khác cùng bài
Video hướng dẫn giải bài tập
Hướng dẫn Giải Bài 69 (trang 36, SGK Toán 9, Tập 1)
GV: GV colearn