[考古] 92暨南

[puppy110330 (慵懶的葉子)]

1.find the directional derivative f(x,y,z)=xySinz in the direction
  --ˋ
   u   =(1/2^1/2,-1,1/2^1/2) at the point(2,1,拍/6)


2.find a triple interated integral for the volume inside the cone
z^2=x^2+y^2 bounded by z=0 and  z=8



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