作者michfish363 (施小鱼)
看板trans_math
标题[积分] 几个积分题目
时间Sat Jul 5 15:21:43 2008
Show that the minimum average cost occurs when
the average cost is equal to the marginal cost
这题目在讲什麽 完全看不懂....
x
Let f(x)= ∫e^(t-1/t^2) dt ,x>=1 Find the interval
1
where f is concave upward, and the interval where
f is concave downward
1 1
Evaluate ∫∫ (x^3+1)1/2 dxdy
0 y^1/2
1 1
我式子列这样 ∫∫ (x^3+1)1/2 dydx 可是怎麽算不出来
0 x^2
是我式子列错吗?
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 122.127.40.220