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1. A easy math question.

[ n------12---------9-------------5---------------0 ] Let S cm per minute be the flowing speed of each hole , then :(n - 12)/(3S) + (12 - 5)/(2S...

目錄：科學及數學 > 數學 2010年11月14日

2. Hypothesis test

目錄：科學及數學 > 數學 2014年03月12日

3. 中四數學題！

...by approx. 3162 times. 2. log20 ~ 1.301 The magnitude of the earthquake on the Richter scale is 5.8 + 1.3 = 7.1 3. A)　100000 X...

目錄：科學及數學 > 數學 2010年03月04日

4. Locus

...2 = mx,and m is directly eliminated to form y = 1/x,Thus, the intersection point P will still lie on y = 1/x no matter how small is mI have checked by Winplot...

目錄：科學及數學 > 數學 2007年02月25日

5. mathematics (Trigonometry)

(1) Let the point on the shore closest to C be X. CX = 5km tan 42 = CX...tan42 + CX/tan67 = 5/0.9 + 5/2.356 = 5.553 + 2.122 = 7.68km (2) Let the horizontal distance between the building and lamp post be x m 25/x = tan33 x...

目錄：科學及數學 > 數學 2009年11月05日

6. why when the speed is high, it s kills more people???

...); (b) speed limits vary from road to road, depending on the design (e.g. straight or curve), the location (e.g. urban or rural), the geographical features ( level or up/down slopes) and the availability of pedestrian facilities (e.g...

目錄：科學及數學 > 數學 2008年03月29日

7. Cauchy sequence (Univ. level )

... on (0,π/2) so by induction,0<x_n<1 On the other hand sinx<=x for all x€(0,π/2) so we have x_2-x_1...

目錄：科學及數學 > 數學 2009年03月26日

8. Trigonometry(3)quick 20 points

...point A, B and C are on consecutive contour lines. Let the difference in height between every two consecutive contour...1007 * 30 m/hr = 30.2 km/h 4. Let the helicopter be x m above the deck Let the ...

目錄：科學及數學 > 數學 2009年11月14日