4.已知函数f(x) =3x²-5x+2,求f(a)+f(3)的值
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![4.已知函数f(x) =3x²-5x+2,求f(a)+f(3)的值](/uploads/image/z/695762-26-2.jpg?t=4.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29+%3D3x%26%23178%3B-5x%2B2%2C%E6%B1%82f%28a%29%2Bf%283%29%E7%9A%84%E5%80%BC)
4.已知函数f(x) =3x²-5x+2,求f(a)+f(3)的值
4.已知函数f(x) =3x²-5x+2,求f(a)+f(3)的值
4.已知函数f(x) =3x²-5x+2,求f(a)+f(3)的值
f(a)=3a^2-5a+2,f(3)=3*3^2-5*3+2=27+2-15=14
所以f(a)+f(3)=3a^2-5a+2+14=3a^2-5a+16