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1. 舊款計算機CASIO fx50F有什麼優點？

...although the fx-3650P (with single-tier dot matrix display) has been thoroughly tested against hacking (ie. unrestricted alphabet input) and is ...

分類：科學及數學 > 數學 2008年08月15日

2. Probablilty (Math)

The probability that 2 of the above events happening =(1-1/4)x1/3x3/4+1/4x(1-2/3)x3/4+1/4x1/3x(1-3/4) =13/48 The probability that 3 of the above events happening =1/4x1/3x3/4 =1/16 The possibility that at least two of the above events happening =13...

分類：科學及數學 > 數學 2013年04月02日

3. Inequalities

Q1) If kx^2+2x+k<0 for all real valuesof x， where k≠0，find therange of the values of k. Sol kx^2+2x+k<0 for all real values of x k<0…………………..(1) 圖形開口向下，恆小於0 圖形與x軸不相交 判別式<0...

分類：科學及數學 > 數學 2013年02月11日

4. Inequalities

Suggested solution kx^2 + 2x + k < 0 Discriminant = 4 - 4k^2 < 0 (1 - k)(1 + k) < 0 -1 < k < 1 Also, k should be less than 0 (as it is the coefficient of x^2) The range of the...

分類：科學及數學 > 數學 2013年02月11日

5. 2 題maths Questions

Question 12(x-1)^2-5(x-1)(x+a)+2(x-a)^2=0 [2(x-1)-(x-a)][(x-1)-2(x-a)]=0 2(x-1)-(x-a)=0 or (x-1)-2(x-a)=0 x+a-2=0 or -x+2a-1=0 x=2-a or x=2a-1Question 2Let the base is x cm and the height is y cm Then √ (x^2+y^2)+6 =x+y..(1) and xy/2=60....(2)From (1) x^2+y^2=(x+y-6)^2 x^2+y^2=x^2+y^2...

分類：科學及數學 > 數學 2011年01月02日

6. APPLIED MATHS probability2

In information for Question 1 seems unreasonable. If steroid has mean = 20 for unhealthy baby, the criteria for healthy baby should not below 24. Please note that 20 is also < 24 2010-04-01 19:01:55 補充： 2a: combined mean (m...

分類：科學及數學 > 數學 2010年04月09日