2.(2022•宣城模拟)已知数列{an}\{a_{n}\}{an}为等差数列,若a1a_{1}a1,a6a_{6}a6为函数f(x)=x2−9x+14f(x)=x^{2}-9x+14f(x)=x2−9x+14的两个零点,则a3a4=(a_{3}a_{4}=(a3a4=( )))