/images/1041385860215607387/1255022264877977650/toan-cau-cu-tinh-tong-luyen-tap-sinh-khai-thuy-chuong-343-khang-ty-nhat-dinh-khong-hoi-nhu-vay-van-de.txt?ex=667b9e11&is=667a4c91&hm=ef5d303903a438b458748ce4838bae3fb2fddd98231e1926802cdb6c2f9a2275&