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Warning: fclose() expects parameter 1 to be resource, bool given in /www/wwwroot/www.wendadaohang.com/inc/function.php on line 2475 高中数学,函数图像,第六题,求详细过程。还有第六题和第八题这一类型的题目,一般解答的套路是什么? - 11问答网