Saturday, May 3, 2008,
7:58 PM
Not any better...
Oh yes. Today is not any better. still feeling the same as ever. *cough. yes bad. very bad.
when i was attending tution classes, i kept on coughing and sneezing...
haii.. sian.. i could not focus...
oh yea.. my friend call me to eat Kfc with him sia.. couldnt turn down his offer... he might be dissapointed... yea.. so i went and eat too, despite having a sorethroat.
And i drank 4 bottles of water, which isaround 2.4 litres.
yes. we walked around parkway... then we left for our next destination at Bras Basah.
we reached there early, so we walked around there, finding some second hand science books.
we walked, we saw, but we didnt buy. And thus, we decided to go to popular.
I saw some science books and i bought it.
As we walked around popular, time flew.
Unknowingly, it was time for tution.
yes. we ran and had tution.
the theory...
so so so Hard to understand.
Yes...so we copy.
ah hah. and example was this.
Given that a,b,c and d are real numbers such that a/b = b/c = c/d =d/a.
Find the largest possible value of ab-3bc+ca/ a2 - b2 + c2.
a/b = b/c = c/d = d/a = k
a=kb
b=kc
c=kd
d=ka
a=kb
=k(kc)
=k2c
=k2(kd)
=k3d
=k3(ka)
=k4a
k4=+1 or -1
k=-1, a=1,b=-1,c=1,d=-1
1(-1)-3(-1)(1)+1(1)/ 12-(-1)2 +12
=-1=3=1=3
xxxxx
i dont know why am i writing this.. nvm..
anyways,
we finished tution and walked to the Bugis mrt station.
and went home.
until now,i am still coughing. *cough
feeling sick....
and so, i'm going to force myself to study!
