請問有更快的解法嗎🙏🏻

76 單元9 二維數據分析 3.某次體操比賽,X、Y、Z三位評審對 五位選手的表現評分如右表,則試比較 X 67 X、Y評分的相關係數與X、Z 評分 的相關係數的大小為 Y 701 Z 7 6 選手1 選手2 選手3 選手4 選手5 手89 4 |手896 5. 7 8 Y₁ >Y "Mx = 2== 1-(3), 2.0-(a) 0(0) 2.0 (8) 1(A) 582= 49+6+49+64+365x1156 7255 425 1740 496 6200 212 725 1560 424 5 My = 37 5 Mz=34 5 S0x= 36+6++36+16+64-5x 1024 = 16-124 sb = 5 255 =234- 1156 5 Sxz = 42+48+424-32448-1588x5 212-1088 -28 5 5300 544 = 49+ 5+ 49+ 25 +81-54 176974 = 285- 56 5 1369 5 £55 Say= 42+ 72+42+0+72-1184x5 =248-1184 56 5 VAY 5 *55 58,782 4.散布圖中有五個樣本點:A(2,1)、B(3,8)、C(5,2)、D(5,4)、E(10,5),則去掉哪一點

第三格時態，看不太懂 答案是have been erected

still other (D) the butle by ancient tribes as a sort of astronomical calenda about lunar and solar eclipses They are believed to 3 The tribesmen may have used them to make the 4 except that we have no idea why they would have been so much interested in eclipse Some think they may have been a temple, meant for religious or ritual ceremonies. 25m5100t the functions were, it remains a mystery just how those huge stones wer moved to the site and placed in such a circular arrangement. ts are still puzzled how the tribesmen managed to move the heavy stone columns. (C) phases (D) ratios boon bas (C) by accident A 1 (A) theses 2 (A) no longer (B) series (B) not only (D) as a whole 3 (A) erect (B) be erecting (C) be erected (D) have been ere A 4 (A) construction (B) predictin

求解這兩題🙏🏻

【例13】 設 x ∈R,試解方程式 [3x]+2[x]-5=0. 5 # 07;5<3x<6.35 <x<2 10<x<1 (3x)+2(x) = 5 2 3 5353x24 3 44 5 > 457x<5 183252 Sol11 【例14】設x∈R,試解方程式x²-x-[x]=0 n (3-2-1 €2 2 x= x < x < x = x+1. 54= x² = 2x50 Ly = x² = 2 x +1 70 LY 練習 23<3 0<X<\ or \<x<? 470 。 2 4<0 (x)=0. f of 470 x=00X (10) <0 @ 1= x²-x x²-x-1=C 21X-2 [2]=22 Salz: floor function 12~3 1.設x∈Z且滿足x=4,則滿足條件的x共有幾個?

不知道怎麼畫 教教我吧 謝謝🙏

8. Sketch the graph of a function y = f(x) that satisfies the following con- ver: ditions: f(0) = 0, lim f(x) = 0, lim f(x) = lim f(x) = ∞ xx x-1- x-1+ lim f(x) = lim f(x) = =-〇〇 x-1+ x-1-

求這三題的過程 謝謝！

L000 In exercises 37-39, determine values of a and b that make the given function continuous. zeros at f(x) #C Some nu Theorer 2 sin x if x < 0 unction continu- X nction should be 37. f(x)= a if x=0 bcosx if x>0 52. For fo Does t

感覺這題要用反函數

Finding Values In Exercises 28-30, find f-1(a) for the function f and real number a. Function 30. f(x) = x³ - Real Number 4 x > 0 a = 6 X

請問綠色框起來的是什麼意思

example.o A,B: sets, |A|-|B|=n<∞ A function f : A → B is one to one Proof (F) Suppose 39, #az & fears = fiaz) : 充分必要 if and only if it is onto. 7-1-4 3 | { bib = fca, for a EA & 979, 192}|≤n-2 =|f(A)| = h-1 < |B| 7 f is not onto Proof

答案是b e g i 想知道為什麼 如何判斷的

33. Let f be some function for which you know only that asob (x)\mil ng if 0</x-3|< 1, then |f(x) - 5 <0.1. Which of the following statements are necessarily true? (a) If x - 3|< 1, then f(x) - 5| < 0.1. (b) If /x-2.51 < 0.3, then f(x) - 5| < 0.1. (c) lim f(x) = 5. x 3 - (d) If 0 < x - 3|< 2, then f(x) = 5| < 0.1. - (e) If 0 < x - 3|< 0.5, then f(x) = 5| < 0.1. (f) If 0 < x - 3|<, then [f(x) - 5|<(0.1). (g) If 0 < x - 3|< 1, then f(x) - 5 < 0.2. (h) If 0 < x - 3|< 1, then |f(x) - 4.95| < 0.05. (i) If lim f(x) = L, then 4.9 L≤ 5.1. x→3

請問為什麼要用過去式（第26題

題組】 Smallholder coffee farmers often earn less than they need to survive. The story of Miguel, a smallholder coffee farmer in Africa, is a case in point. Miguel did not own a big farm, so he could only produce a small crop and make a small profit. This situation 268 as Miguel's coffee beans had to go through many middlemen before they reached the retail elves. As a result, Miguel only got about 7% to 10% of the retail price as his earnings. Besides economic challenges, Miguel also faced social and environmental problems. Miguel's community lacked infrastructure such as roads, schools, and hospitals. Without these, the community could not function properly, let alone help Miguel, 27 his problems. What's worse, Miguel used cheap pesticides to

需要這四題的詳解🥲🥲🙏（微積分）大一

8./On what intervals are the following functions continuous? a. f(x) = tan x b. g(x) = CSC X COS X c. h(x) d. k(x) = = X sin x X T