<span data-v-a7c68f28="">Hướng dẫn giải Hoạt động 3 (Trang 58 SGK Toán Giải Tích 12)</span>
<p><strong>Đề bài</strong></p>
<p>Tính đạo hàm của hàm số: <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>y</mi><mo>=</mo><msup><mrow><mo>(</mo><mn>3</mn><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><mn>1</mn><mo>)</mo></mrow><mfenced><mrow><mo>-</mo><msqrt><mn>2</mn></msqrt></mrow></mfenced></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 open="[" close="]"><msup><mfenced><mrow><mn>3</mn><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><mn>1</mn></mrow></mfenced><mrow><mo>(</mo><mo>-</mo><msqrt><mn>2</mn></msqrt><mo>)</mo></mrow></msup></mfenced><mo>'</mo></msup><mspace linebreak="newline"/><mo>=</mo><mo>-</mo><msqrt><mn>2</mn></msqrt><msup><mrow><mo>(</mo><mn>3</mn><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><mn>1</mn><mo>)</mo></mrow><mrow><mo>(</mo><mo>-</mo><msqrt><mn>2</mn></msqrt><mo>-</mo><mn>1</mn><mo>)</mo></mrow></msup><mo>.</mo><msup><mfenced><mrow><mn>3</mn><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><mn>1</mn></mrow></mfenced><mo>'</mo></msup><mo> </mo><mspace linebreak="newline"/><mo>=</mo><mo>-</mo><msqrt><mn>2</mn></msqrt><msup><mrow><mo>(</mo><mn>3</mn><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><mn>1</mn><mo>)</mo></mrow><mrow><mo>(</mo><mo>-</mo><msqrt><mn>2</mn></msqrt><mo>-</mo><mn>1</mn><mo>)</mo></mrow></msup><mo>.</mo><mn>6</mn><mi>x</mi><mspace linebreak="newline"/><mo>=</mo><mo> </mo><mo>-</mo><mn>6</mn><msqrt><mn>2</mn></msqrt><mi>x</mi><msup><mrow><mo>(</mo><mn>3</mn><msup><mi>x</mi><mn>2</mn></msup><mo>-</mo><mn>1</mn><mo>)</mo></mrow><mrow><mo>(</mo><mo>-</mo><msqrt><mn>2</mn></msqrt><mo>-</mo><mn>1</mn><mo>)</mo></mrow></msup></math></strong></p>