請問時間算是interval data 嗎？謝謝

經濟學有人會嗎？經濟學好難噢

1、當總產量為 100 單位,TFC=300,TC=700,若總產量提升至 120 單位,TVC=460,則 MC 為 多少? 2、若總產量為 10 單位時,總成本為$100,總產量增加至 12 單位時,總成本變為$130,則每增加1 單位總產量時,邊際成本為多少? 3、總產量為 20,勞動投入為1個單位,固定成本$10,000,變動成本$1,000。請計算以下項目: (1)ATC (2)AFC (3)AVC 4、總成本為$2000,平均固定成本為$15,總產量為 100 單位。平均變動成本為多少?

請問這題用兩種不同方式算出來的答案為什麼會差一個負號呢？是我計算錯誤嗎？

2. Ssecx tan³x dx (1) S sectx tan ³x dx = +an³ (1+tan²x) (sec²x) dx = Su ³ (1+u²) du = Su ²³+ u ² du = = { u²+ + u ² + c = & tan²x + 1/6 tan " x +C <²)| sec ²x tan³x = S sec³x tan'x (secx tanx) dx = [sec ³x (sec² x-1)(secx+anx) dx = Su²³ (u²-1) du = Su ³-u³ du 4 = — u ² - £u² + C ku = tanx dục seo xdx = — secx - & secª du +C 4 u=secx du = secx tanx dx

想請問這題要怎麼解🙏

8. a. The graph in the accompanying figure is made of line segments joined end to end. At which points of the interval [-4, 6] is f' not defined? Give reasons for your answer. b. Graph the derivative of f. The graph should show a step function. (-4,0) (0, 2) 1 (1, -2) y = f(x) (4,-2) (6. 2) 6 [§3.2-31]

求解51.52

us a function of its velocity with respect to an observer, where Lo is the length of the object at rest and c is the speed of light. Find lim,→c- L and interpret the result. Why is a left-hand limi necessary? 49-56 Find the limit. 49. lim x-0 X 51. lim sin 3x - 1m 3 Sin³x 3f tan 61==3*1=3 1-0 sin 2t 53. lim sin 3x x-0 5x³ - 4x lim sims = 50. lim - sin 4x 52. lim x-0 sin 6x inli cos 8 - 1 0-0 sin 0 54. lim X-0 lims sin 3x sin 5x .2 X 3

我不確定這樣寫對不對 如果是 對的，再來還需要加e嗎？ 錯的，那該如何解呢？

O C O O √ 4₁ y' sin ₂πx = πy cosan X y' = π y Cotex x 1 → Cot 2πx dx = xy dy ln | Sin₂Tux| = = y² + C

求解！圈起來的題目，最好能有計算過程，如果可以跟我解釋的話更好😢謝謝 麻煩了🙏🏻

25-28 Find the domain of the function. adox + 4 x² - 9 25. f(x) = 27. h(x) 1 Vr2 – 5x x2 26. f(t) = √2t - 1 28. F(p)=√√2-√P

統計學 樣本標準差

里 某班有 40 名同學,平均身高爲 170 公分,標準差為5公分。後來發現 某位同學的資料登記有誤,應爲 160 公分,誤記為 150 公分。試問該班 正確的平均身高與標準差應為何? CHI 2 會找不拘數與絲恩斯 。 若有

有高手能幫忙解答嗎

2. Let P be the set of all polynomials with integer coefficients and Pn = {ƒ € P: ƒ has degree n} for n € N. Prove that Pn and P are countable.

這個(c)的 inverse reciprocal trigonometric functions 是指什麼？(hahaha)

In a similar manner, one can define the 'arccosine' and 'arctangent' functions by 'restricting the domains'. The following table summarizes the domains and ranges of these inverse functions. Function Domain Range Function f(x) = sin¯¹(x)| (-1,1)|(−½, 3) || f(x) = sec¯¹(x) f(x) = cos ¹(x) [−1,1] f(x) = tan-¹(x) [0, π] Domain Range R (-)|| f(x) = cot-¹(x) x2! [-7,7- XZ1 OY f(x) = csc¯¹(x) 85-1 xs-1 but fuxito Exercise 4. (a) Sketch the graph y = tan-¹(x) (b) From (a), write down lim tan-¹(r) and lim tan-¹(x). x48 8118 (c) Look up the relevant section in the textbook (Stewart), write down the domains and ranges of the 'inverse reciprocal trigonometric functions' on the right hand side of the above table.