viết công thức toán $x^2-x-9=0$
[wp_quizjson]
{
“question_type_id”: “Giải tích 12”,
“questions”: [
{
“type”: “mcq”,
“question”: “Tính tích phân \\(\\int_0^1 x^2 dx\\)”,
“option_a”: “$\\frac{1}{2}$”,
“option_b”: “$\\frac{1}{3}$”,
“option_c”: “$\\frac{2}{3}$”,
“option_d”: “$1$”,
“correct_option”: “B”,
“explanation”: “$\\int_0^1 x^2 dx = \\left[\\frac{x^3}{3}\\right]_0^1 = \\frac{1}{3}$”,
“difficulty_level”: “medium”,
“is_dynamic”: false
},
{
“type”: “mcq”,
“question”: “Đạo hàm của $f(x) = \\sin(2x)$ là:”,
“option_a”: “$\\cos(2x)$”,
“option_b”: “$2\\cos(2x)$”,
“option_c”: “$-2\\sin(2x)$”,
“option_d”: “$2\\sin(2x)$”,
“correct_option”: “B”,
“explanation”: “$f'(x) = 2\\cos(2x)$ theo quy tắc đạo hàm hàm hợp”,
“difficulty_level”: “medium”,
“is_dynamic”: false
}
]
}
[/wp_quizjson]