[微積] Line Integral
積分中間一個圈圈
↑
Evaluate the line integral S y^3 dx - x^3 dy
c
where C is the circle x^2 + y^2 =4
看不太懂這題的敘述是要積哪個東西
以及那個積分中間一個圈圈的符號是什麼意思
有請版上幫忙了
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