問題詳情
19 若 ϕ ( x, y , z) = xy − yz + xyz ，則其在點 P = (0,−1, 1) 之最大改變率（rate of change）之值為何？
(A)−2
(B)2
(C) √5
(D) √6
參考答案
無參考答案
內容推薦
- 17 求 之值為何？ (A) (B) (C) (D)
- 16 若 X 為一連續隨機變數（continuous random variable），其機率密度函數（probability density function）為 ，試求 k =？ (A)1 (B
- 15 給定一個常態分布（Normal Distribution）的隨機變數 X，它的期望值（mean）為 0，變異值（variance）為 5。已知 P (X ＞ C) = 0.05，也就是 X 大於
- 14 一個盒子中有 998 個黑球及 2 個白球，若自盒中隨機挑選 500 球，令 x 為其中白球之數量，試求條件機率 P ( x = 1 | x = 1 或 x = 2) =？(A) (B) (
- 13 兩連續隨機變數 X、Y 之結合機率密度函數（joint probability density function）為 ，求 P( X ＜ Y ) =？ (A) (B) (C) (D)
- 12令矩陣 ，則下列敘述何者錯誤？(A) (B)若 θ = π / 10 ，則矩陣 B 為單位矩陣（unit matrix）(C)無論 θ 為何值，矩陣B及 的特徵值（eigenvalue）之絕對值均
- 11 設 A 為 3× 3 的矩陣，若 A 的行列式值 ，則 det(-2A)之值為何？(A)-6 (B)6 (C) 24 (D)-24
- 10 轉換 T : R 2 → R 3 定義為 ，則：(A) (B) (C) (D)
- 9 若 A 及 B 皆為正交矩陣（orthogonal matrix），則下列敘述何者不恒真？(A)矩陣 AB 也必為正交矩陣(B)矩陣 A+B 也必為正交矩陣(C)矩陣A-1也必為正交矩陣(D) （
- 8 複變函數 為中心展開的羅倫級數（Laurent series）為何？其中 i = √− 1 。(A) (B) (C) (D)
內容推薦
- 53歲男性，因水腫及嚴重蛋白尿住院，腎臟穿刺顯示病理變化為:膜性增生性腎炎（membranoproliferative GN），他也有冷凝球蛋白血症（cryoglobulinemia），下列那一種
- 顯影劑腎病變(contrast nephropathy)之引發主要與何種介質(mediator)有關？(A)腎上腺皮質醛酮(aldosterone)(B)內皮素(endothelin)(C)前列腺
- Eric, _______ you help me with theseboxes?(A) may(B) could(C) should(D) do
- Sir, this is a _______ zone. Will youplease move your car?(A) no-park(B) no-parking(C) not-parked
- Let's _______ down and relax for awhile.(A) sitting(B) sat(C) sit(D) to sit
- There _______ four applicants in thewaiting room.(A) has(B) have(C) is(D) are
- It's very _______ that the field triphas been cancelled.(A) disappointing(B) disappointed(C)
- My grandmother spends _______ hertime on the vegetable farm.(A) much of(B) much(C) many of(D) a l
- The radio is too loud； please _______a little.(A) turn it out(B) turn it off(C) turn it away(D) t
- Cindy will be responsible for_______ guests at the party.(A) receive(B) receiving(C) to receive(D
- In Western culture, guests are notexpected _______ gifts, but a smalltoken such as wine or flowe
- Letters from our families _______ uswhat is happening at home.(A) say(B) talk(C) tell(D) speak
- Jason is excited about _______ toJapan next year.(A) will go(B) to go(C) going(D) be going
- All the guests are requested to_______ their shoes before they enterthe house.(A) turn on(B) tur
- Amy said there was a lot of food onthe table, but we didn't see _______.(A) one(B) them(C)
- Phoebe _______ to be the next classleader.(A) was assigned(B) has assigned(C) assigned(D) assign
- Mr. Smith promised to _______ hischildren to the zoo this afternoon.(A) show(B) take(C) carry(D)
- The legislator chose not _______ theconference to show his disapproval ofthe bill.(A) attend(B)
- I'll stay home until the postman_______.(A) comes(B) come(C) will come(D) will be coming
- You'd better measure the _______ ofyour room before ordering the desk.(A) wide(B) widen(C)
- After Typhoon Gloria, the streets wereblocked by _______ tree branches.(A) break(B) breaking(C)
- What on earth _______ when I calledyou this morning?(A) were you doing(B) are you doing(C) have
- The Empire State Building _______in lower Manhattan in New York.(A) is location(B) is located(C)
- My brother was in a bad mood_______ he failed the history exam.(A) even if(B) as for(C) though(D
- Fred hasn't seen his aunt _______ hewas a boy.(A) after(B) before(C) since(D) when