nex_math/data/question_images/generated_37228572e66647378697e8ea7d7e847a.svg

<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 320 220' width='320' height='220'><rect width='320' height='220' fill='white'/><line x1='30' y1='180' x2='280' y2='180' stroke='black' stroke-width='1.5'/><line x1='160' y1='20' x2='160' y2='200' stroke='black' stroke-width='1.5'/><polygon points='280,180 272,176 272,184' fill='black'/><polygon points='160,20 156,28 164,28' fill='black'/><text x='285' y='185' font-size='12'>x</text><text x='165' y='25' font-size='12'>y</text><polyline points='40,40 100,120 190,120 250,40' fill='none' stroke='blue' stroke-width='2.5'/><circle cx='100' cy='120' r='3' fill='red'/><circle cx='190' cy='120' r='3' fill='red'/><line x1='100' y1='120' x2='190' y2='120' stroke='red' stroke-width='2' stroke-dasharray='4 3'/><text x='118' y='110' font-size='12' fill='red'>最小值=3</text><text x='85' y='195' font-size='11'>-2</text><text x='185' y='195' font-size='11'>1</text><text x='250' y='35' font-size='12' fill='blue'>f(x)</text></svg>