ˇ3.
Suppose it is know that f(0)=3 and
pi
∫{f(x)+f''(x)}sinx dx
0
What is f(pi)?
6.
In an inverse equare force field F=cr/|r|^3 , C is a const.
and r = xi+ yj+zk ,find the work done in moving a partical along
the line from (1,1,1) to (3,3,3) (r是向量喔！）
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