Re: [積分] 幾個積分題目
※ 引述《michfish363 (施小魚)》之銘言：
: Show that the minimum average cost occurs when
: the average cost is equal to the marginal cost
: 這題目在講什麼 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
f is concave upward on I if f' > 0 on I
f is concave downward on I if f' < 0 on I
剩下就從 FTC 囉
: 1 1
: Evaluate ∫∫ (x^3+1)1/2 dxdy
: 0 y^1/2
: 1 1
: 我式子列這樣 ∫∫ (x^3+1)1/2 dydx 可是怎麼算不出來
: 0 x^2
: 是我式子列錯嗎?
1 x^2
∫ ∫ (x^3+1)^(1/2) dy dx
0 0
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