f(x)=3x²+x,那么f''(x)=( )
f(x)=e²,那么f''(3)=( )
f(x)=3x²+2e²,那么f''(x)=( )
f(x)=3x²+x,那么f''(2)=( )
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设y=(x^2)lnx,则
f(x)=3x²+2e²,那么f''(2)=( )