(1)f(x)=1/3x^2-4x+1/3 (2)y=-x^3+3x+1 (3)y=e^x-ex 求以上3个的极值,
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(1)f(x)=1/3x^2-4x+1/3 (2)y=-x^3+3x+1 (3)y=e^x-ex 求以上3个的极值,
(1)f(x)=1/3x^2-4x+1/3 (2)y=-x^3+3x+1 (3)y=e^x-ex 求以上3个的极值,
(1)f(x)=1/3x^2-4x+1/3 (2)y=-x^3+3x+1 (3)y=e^x-ex 求以上3个的极值,
f'(x)=2/3x-4=0得x=6带入f(x)得-35/3.(2).y'=-3x^2+3=0得x=1或x=-1.代入得3和-1.(3).y'=e^x-e=0得x=1.代入得0.
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