nex_math/data/question_images/generated_8c4c67f3adfb43709ee9caab4b09c1d9.svg

<svg xmlns='http://www.w3.org/2000/svg' width='340' height='220' viewBox='0 0 340 220'><rect width='100%' height='100%' fill='white'/><line x1='20' y1='160' x2='320' y2='160' stroke='black' stroke-width='1.5'/><line x1='60' y1='20' x2='60' y2='200' stroke='black' stroke-width='1.5'/><polygon points='320,160 312,156 312,164' fill='black'/><polygon points='60,20 56,28 64,28' fill='black'/><text x='325' y='165' font-size='12'>x</text><text x='65' y='25' font-size='12'>y</text><line x1='180' y1='25' x2='180' y2='195' stroke='gray' stroke-dasharray='4 3'/><text x='184' y='35' font-size='12' fill='gray'>x=2</text><path d='M186 35 C195 70 220 110 300 135' fill='none' stroke='blue' stroke-width='2'/><text x='210' y='80' font-size='12' fill='blue'>递减</text><text x='185' y='175' font-size='12' fill='gray'>(2,+∞)</text><text x='20' y='210' font-size='12'>f(x)=(ax+1)/(x-2)</text><text x='20' y='15' font-size='12'>a&gt;-1/2</text></svg>