2010 STPM Maths 1答案 (完)

whyyie

注: f(0) = 2. 之前算错了.

whyyie

sookchin

whyyie 发表于 9-12-2010 02:38 PM

    都是你的答案？真的很厉害。。。

yilee

眼睛要掉出来了。。。

數學神童

whyyie 发表于 9-12-2010 12:19 PM

i think ur answer cannot have negative sign in front since the first part u get x>0.i think will deduct 1 mark if u put ur answer like that. my answer is x=ln(4/3)

數學神童

回复 5# whyyie


when u use set notation, u cannot use 'and' and 'or' terms. if u want to use the 2 terms then u should not put set notation.

數學神童

回复 8# whyyie


    u have to show that x^2-4x+5 is always positive for all real values of x instead of saying that it has complex roots.

數學神童

whyyie 发表于 9-12-2010 02:36 PM

    why f(0)=3?? i get f(0)=2

yilee

why f(0)=3?? i get f(0)=2
數學神童 发表于 9-12-2010 03:14 PM

我也是。。。

數學神童

i think there is a relationship between pure math and further math. last year pure math was quite easy whereas further math was quite tough. but this year is even more terrible, pure math damn easy whereas further math damn difficult.

yilee

i think there is a relationship between pure math and further math. last year pure math was quite ea ...
數學神童 发表于 9-12-2010 03:20 PM

你拿further math??

whyyie

回复 28# 數學神童

我做错了

Allmaths

i think ur answer cannot have negative sign in front since the first part u get x>0.i think wi ...
數學神童 发表于 9-12-2010 03:09 PM

   
没关系的啦。。。ln(3/4)也是negative...

Allmaths

回复  whyyie


when u use set notation, u cannot use 'and' and 'or' terms. if u want to use the  ...
數學神童 发表于 9-12-2010 03:11 PM

   
我没听过在set里面不可以用'and' 或 'or'。。。

如果照你这么说。。。你怎样做？

Allmaths

回复  whyyie


    u have to show that x^2-4x+5 is always positive for all real values of x inst ...
數學神童 发表于 9-12-2010 03:12 PM

   
这个我认同。。。用completing the square 可得证。。。

whyyie

whyyie

注:
(x+2)^2 + (y-3)^2 = 5^2
x^2 + 4x+4 + y^2 - 6y +9 = 25
x^2 + y^2 + 4x - 6y - 12 =0

nkrealman

whyyie 发表于 9-12-2010 03:50 PM

   是应该是 -12...

whyyie

whyyie

回复 38# nkrealman

什么东西-12 . 看不出.