y=2(x^3)+5x,当x=3时,请问dy/dx =多少
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y=2(x^3)+5x,当x=3时,请问dy/dx =多少
y=2(x^3)+5x,当x=3时,请问dy/dx =多少
y=2(x^3)+5x,当x=3时,请问dy/dx =多少
dy/dx=6x^2+5 so when x=3 dy/dx=59
dy/dx=2x^2+5然后将X=3代入得23