[微積] 積分
1.Determine the area of the region bounded by y = x^2 - 4x and y = x-4
我算出來是9/2，答案卻是3/8 ~"~
b y x^b - x^a
2.試證∫ x dy = -----------
a lnx
1 t^2 1/2 -t^2
3.Let A =∫ e dt , B =∫ e dt .
0 0
1 x -y^2 B
Such that ∫ ∫ e dy dx = A - --- + C .
-1/2 0 2
Find C.
1 1 1
A: C = ---（--- - --------）
2 e e^(1/4)
以上，麻煩各位了，謝謝:)
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