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1. 排列方式

1. ### Central force question?

...)^2 - (Vb)^2]/(2.(X - 1)) Substitute into (1): (Vb)^2 < [(Va)^2 - (Vb)^2]/(2.(X - 1)) Divide both sides by (Vb)^2, 1 < [(Va...

分類：科學及數學 > 物理學 2018年04月09日

2. ### There is a line through the origin that divides the region bounded by the parabola y = 4 x - 2 x^2 and the x-axis into two regions with....?

設此直線為 y = mx 並設此直線與題目的拋物線交點為 ( a , ma ) 繪出拋物線的簡圖可知: (1) 拋物線與 x 軸交於 x = 0 與 x = 2 (2) 拋物線與 x 軸所圍成的區域 ...

分類：科學及數學 > 數學 2017年02月06日

3. ### Use Pigeonhole Principle to show that among any 4 numbers, one can find 2 numbers so that their difference is divisible by 3.?

...where ⌊...⌋ is the floor function. Natural numbers can be divide into 3 sets : A0 = { 3k｜k = 0 , 1 , 2 , 3 , ..... } = ( 0 , 3 , 6 , 9...

分類：科學及數學 > 數學 2016年11月22日

4. ### Find the number of arrangements?

a) 9!/(2!3!4!) = 1260 b) 9!/(2!3!4!) × 3! = 1260 × 6 = 7560 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = a) 把 9 個不同東西排成一列：共有 ...

分類：科學及數學 > 數學 2016年10月14日

5. ### Circuit question!!?

... from Q along the upper brass bar to X, where the flow of current divides into two paths, one through the coil to P (i.e. to the left) and back to ...

分類：科學及數學 > 物理學 2016年09月16日

6. ### Variations?

...piece of paper. He finds that the piece of paper is at most 　　divided into 3 regions, as shown in Figure 3(a). (2) Then he...

分類：科學及數學 > 數學 2016年06月15日

7. ### Polynominal problem

...the remainder and the quotientwhen f(x) is divided by x²＋x－2, so,f(x)＝(x²＋x－2)...＝-7⋯⋯⋯⋯(2)(1)－(2) get A＝3Sub. into (1) get B＝-1∴ the remainder ...

分類：科學及數學 > 數學 2015年08月02日

8. ### Probability

...20 = 15/20 = 3/4 2015-07-06 21:29:34 補充： For continuous data, if you divide into groups of (10 - 14), (15 - 19), (20 - 24), (25 - 29), etc. Look ...

分類：科學及數學 > 地理學 2015年07月07日

9. ### 如何入行汽車維修

...that you will face some difficulties. Also - the industry is divided into many aspects, such as engine work, body/welding, and so on. And...

10. ### F.5 MATHS

... family has decided to deposit \$350 into an annuity every 3 months for 4 years. ... the interest rate given is annual, divide it by 4 to get the ...

分類：科學及數學 > 數學 2015年06月15日