右下角是解答，但我一直算不出來，請幫我解答一下，還有過程

Apply elementary row operations to transform the following matrix first into echelon form and then into reduced echelon form. 64-5 3 -6 3 -7 -7 8-589 3-9 12-96 15 1 0-2 3 0 -24 0 1 -2 2 0 -7 000014 62 62

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

這題的解答給的是C, 該怎麼求出，感謝！

6. Find the volume of the solid whose region is the intersection of the cube {(x, y, z) : |x| ≤ 1, |y| ≤ 1, || ≤ 1} and the ball {(x, y, z) = x² + y²+ z² < 2}. 16 (A) 32(√2-1). (B) (8-√2). 3 16 (C) (10- √2)TT. (D) √√2π. 3 32 3

想請問這題的圖應該怎麼畫

PO WWW VI VO 2.33 The diode cut-in voltage is 0.7 V and VB = 1.8 V for the circuit shown in Fig. 5. Plot vo versus v, over the range, <+5 V R = 4 KW VB D 3 Vo •T• 2.33 (a) (1) V₂ =1.8 V For U₁ 21.1V, Vo = V₁ For U, $1.1V, vo = 1.1V 72/7

想請問一下這題怎麼寫？ 感謝各位大神🥺

2. The following table summarizes results from an experiment in which subjects were first classified as smokers or nonsmokers. After these subjects were given a treatment, later they were again classified as smokers or nonsmokers. After-smoker After- non-smoker Before- smoker 40 14 Before- non- smoker 5 80 2-1. How many subjects changed their smoking status after the treatment? 2-2. How many subjects appear to be unaffected by the treatment? 2-3. Using the appropriate frequencies, find the value of the test statistic. 2-4. Using a 0.025 significance level, find the critical value, and make your conclusion. 2-5. Based on the preceding results, do you think this treatment is really benefit to help people quit smoking?

以下是心統的題幹 想請問第c題算出來是6.88是要回答6還是7位？

2. Suppose the average height of all distribution is normal. 假設 students is 165 cm. The standard deviation is 10. The 學生的身高平均為 165 cm,標準差為10,呈現常態分配。

想問這題要怎麼解 只有想到要用左右極限相等

15. Let x cot kx if x < 0 = (2.0) if x ≥ 0 EURCHSHA Find the value of c that will make f continuous at x = 0. FIGURS Glaidw |[ 2.0] to unioqbim srb (7) f(x) Jx L x ² + c =

求解找極限函數值或者為什麼不存在，還有想問x->-3右上的正號與x->-3有甚麼區別？還有b連題目都不太了解要求什麼,c的話有哪些不是連續的？求求各位大神了🙏

20. The graph of f is given. (a) Find each limit, or explain why it does not exist. (i)_lim_ƒ(x) x−2+ (ii) lim_ f(x) x--3+ (iii) lim f(x) x--3 (iv) lim f(x) X→4 (v) lim f(x) x->0 0 (vi) lim f(x) x→2- (b) State the equations of the vertical asymptotes. (c) At what numbers is f discontinuous? Explain.

急需❗️想問一到三題🥲

CH 7 Exercise (B) .. 12 Ex 1. A company borrowed $100 from a bank on 12/1, annual interest rate is 12%. The company need to repay the loan within a year. Please do the entry on 12/1 and accrued interest expense on 12/31 for the company Ex2. A company borrowed $1,000 form a bank. It is a long-term loan of five years from 1/1/2001 to 12/31/2005, which needs to be converted to a current liability at the end of 2004. Please do the reclassification entry on 12/31/2004. Ex3. A subscriber (customers) ordered a magazine and paid in advance for subscription. The subscriber paid 120 for one year on 7/1/2023. Please do the entries for the publisher on 7/1/2023 and 12/31/2023. Ex4. An applicant buy an accident insurance with coverage period of a year and paid $24C on 8/1/2020. Please do the entries for the insurance company on 8/1/2020 and 12/31/2020. Ex5. real estate tax bills $1,100 for 2022 are not issued until April of the following year an are payable in May. Thus, do an entry for accrued property tax on 12/31/2022 and 5/31/2023.

求解第3、4題🙏 證明題總是卡住...

3. Let Bo and ₁ denote the least squares estimators of Bo and 3₁. Define SSE = Σ(Yi-Bo- i=1 B₁X₁)². Show that (a) E (SSE) = 0², (b) cov(Y, ₁X) = 0. 4. In Section 10.4, we defined a test statistic where s² = T = VSEZ SSE. In addition, it is known that T~: n-2' (a) Show that (1) can be re-written as 1 tn-2. T = r√n-2 (1) (2) (b) Use Part (a) to test Ho: p = 0 vs H₁ p 0. [Hint: (2) can be regarded as a test statistic under Ho.]