[考古] 98台聯
Let S be the surface parametrized by r(θ，z) = 3sin2θi + 6(sinθ)^2j + zk
where 0 < θ < 2π Which of the following is equivalent to the surface
differential dσ?
(A) 1/3 dθdz (B) dθdz (C) 3dθdz (D) 6dθdz (E) 12dθdz
b
Find the values a < b such that ∫ 1-e^(1-x^2) dx has minimaal value.
═ a
第二題感覺最小值是當a=b時積分式為0只是不知道怎麼證明
請各位高手幫忙了
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.134.115.251
推
06/09 20:41, , 1F
06/09 20:41, 1F
→
06/09 20:57, , 2F
06/09 20:57, 2F
推
06/09 21:11, , 3F
06/09 21:11, 3F
→
06/09 21:12, , 4F
06/09 21:12, 4F
→
06/09 21:13, , 5F
06/09 21:13, 5F
推
06/09 21:14, , 6F
06/09 21:14, 6F
推
06/09 21:16, , 7F
06/09 21:16, 7F
→
06/09 22:29, , 8F
06/09 22:29, 8F
討論串 (同標題文章)