Bài 2: Hàm số lũy thừa
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<span data-v-a7c68f28="">Hướng dẫn giải Hoạt động 2 (Trang 57 SGK Toán Giải Tích 12)</span>
<p><strong>Đề b&agrave;i</strong></p> <p>T&iacute;nh đạo h&agrave;m của c&aacute;c h&agrave;m số:&nbsp;</p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>y</mi><mo>=</mo><msup><mi>x</mi><mfrac><mrow><mo>-</mo><mn>2</mn></mrow><mn>3</mn></mfrac></msup><mo>;</mo><mo>&#160;</mo><mi>y</mi><mo>=</mo><msup><mi>x</mi><mi mathvariant="normal">&#960;</mi></msup><mo>;</mo><mo>&#160;</mo><mi>y</mi><mo>=</mo><msup><mi>x</mi><msqrt><mn>2</mn></msqrt></msup></math></p> <p><strong>Lời giải chi tiết</strong></p> <p><strong><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>y</mi><mo>'</mo><mo>=</mo><msup><mfenced><msup><mi>x</mi><mfrac><mrow><mo>-</mo><mn>2</mn></mrow><mn>3</mn></mfrac></msup></mfenced><mo>'</mo></msup><mo>=</mo><mfrac><mrow><mo>-</mo><mn>2</mn></mrow><mn>3</mn></mfrac><mo>.</mo><msup><mi>x</mi><mrow><mo>(</mo><mfrac><mrow><mo>-</mo><mn>2</mn></mrow><mn>3</mn></mfrac><mo>-</mo><mn>1</mn><mo>)</mo></mrow></msup><mo>=</mo><mfrac><mrow><mo>-</mo><mn>2</mn></mrow><mn>3</mn></mfrac><mo>.</mo><msup><mi>x</mi><mfrac><mrow><mo>-</mo><mn>5</mn></mrow><mn>3</mn></mfrac></msup><mspace linebreak="newline"/><mi>y</mi><mo>'</mo><mo>=</mo><msup><mfenced><msup><mi>x</mi><mi mathvariant="normal">&#960;</mi></msup></mfenced><mo>'</mo></msup><mo>=</mo><mi mathvariant="normal">&#960;</mi><mo>.</mo><msup><mi mathvariant="normal">x</mi><mrow><mi mathvariant="normal">&#960;</mi><mo>-</mo><mn>1</mn></mrow></msup><mspace linebreak="newline"/><mi mathvariant="normal">y</mi><mo>'</mo><mo>=</mo><msup><mfenced><msup><mi mathvariant="normal">x</mi><msqrt><mn>2</mn></msqrt></msup></mfenced><mo>'</mo></msup><mo>=</mo><msqrt><mn>2</mn></msqrt><mo>.</mo><msup><mi mathvariant="normal">x</mi><mrow><msqrt><mn>2</mn></msqrt><mo>-</mo><mn>1</mn></mrow></msup><mspace linebreak="newline"/></math></strong></p>
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