hw and things to bring 9/2/09

Todays hw:
exercise 2.2 qn 5-13

tuesday's lessons:
PE , E math , physics , mother tongue and ME

REMEMBER!!!
bring along your e math tys and notebook just in case mdm lo ask for it....
and good luck for the mother tongue test tomrrow^^
remember to wear pe shirts and shorts tomrrow... u don't wan to do extra push ups...

Some help regarding connected rate of change

En ze commented that he has difficulty in sieving out the important information in connected rate of change questions. I am sure many otehrs face the same problems too.
So, I am going to post this 2 examples to illustrate how you can sieve out information.






The types of questions are endless. These are but 2 out of the tonnes that I have.
Nonetheless, with the right attitude and adequate practice, all of you shouldbe able to do these questions in future.

HEY ben!! wow nice blog... but thanks for the solution. it really help me... the kopitiam prank is funny!!!!!1 see u at school!!!!!!!!!!!!

Clues to your HW Ex 16.1

Q1-3 are very standard questions. You are should not have problems.

Q4. A similar question was done in class. Check your class ntoebook.

Q5a. Find dy/dx. (you should know what rule to use)
Q5b. At stauionary points, dy/dx = ? (hence you can solve to find x)

Q6.
Just do your dy/dx first.
Then, ask yourself: What is the dy/dx at the stationary point?
Since the stationary point is at (3, 5), the value of x is 3.
Substitute into dy/dx and you get 1 linear eqn.
At this point, x=3 and y=5. Substitute into original equation and you should get another linear eqn.
Solve simultaneously.

Q7 to 10 are quite similar.
All of you should be able to do dy/dx and find the x-coordinates of the stationary points.
What does nature of the stationary points mean?
Whether they are minimum, maximum or point of inflexion. (check textbook examples)

HOMEWORK AND THINGS TO BRING 6/2/09

hey guys sorry for the late post if ppl even see my post....

Todays hw:
A math textbook ex 16.1 all the questions, do on foolscap paper
geography paper on rivers ( do it if u don't want to stay back with mr john lim...)

monday's lessons:
english , E math , geography

REMEMBER!!!
bring along your e math tys and notebook just in case mdm lo ask for it....
and good luck for the physics test on monday ^^ hope many ppl can win me this time because i don't want to send my files for checking haha

p.s
remember to check out the post below mine ^^

homework tips out in sc1enceguru.blogspot.com by your science guru ben pang lol...

A Math HW, E Math common test

It is so difficult to try to contain my laughter in class.
My face was stern but my heart was smiling.
Very nice to see the class so co-operative, quiet and attentive.
Should we keep up with this? Tell me by commenting below.


Anyway, this weekend's A math assignment should be done on foolscap paper. You can do several questions on 1 page. However, you must be neat and clear.

Try all questions first. I will post some clues here on Sunday.


E Math common test--
Generally, I am happy with the class' performance.
I will give out the paper on Monday and we will do corrections then.

A maths home work clues for 5(ii)

use the formula dv/dt=dv/dx. dx/dt
dv/dt = 40
dv/dx=pie height square/9
find dx/dt

the depth x means height so all height are convert to x

Q5 clues

typo error in question.............

replace r by x.

Solutions for Amath homework, specially by CHARLENE TAY!!! :) :) :)

Q1. y=(3x-2)^10 over 6

dy/dx = 10(3x-2)^9 (3) over 6

= 30 (3x-2)^9 over 6

When x=1/3,

30 (1-2)^9 over 6 = -5

dy/dx = dy/dx . dx/dt

dy/dx = -10 units/s

Q2.

(i) Clue-Write down all the information given first then start thinking.

dv/dt = dy/dx . dx/dt

60 = (0.03x^2 + 4.4x + 200) . dx/dt

When x = 10, 60 = (3+44+200) . dx/dt

60 = 247 . dx/dt

dx/dt = 60 over 247 cm/s

(ii) dx/dt = 0.2

60 = (0.03x^2 + 4.4x +200) . 0.2

0.03x^2 + 4.4x - 100 = 0

Use formula to solve for x.

Ans: x = 20cm

Q3. y = 3/4 ( x/12 - 1)^6

dy/dx = 3/4 [(6) (x/12 -1)^5 (1/12)]

= 3/8 (x/12 - 1)^5

dy/dt = 12 dx/dt

3/8 (x/12 -1)^5 = 12

(x/12 - 1)^5 = 32

x/12 - 1 = 2

x/12 = 3

x = 36

y = 3/4 ( 36/12 - 1 )^6

y = 48

As for Q5, we'll ask Math Guru tomorrow in class.

(cause I also don't know how to do , hahahas :p) but do try, if not she will scold! >:{

4N1, jia you! Study hard! Don't make our teachers DISAPPOINTED!

05Feb TYS homework.

05 feb TYS HW

Topic: Differentiation--Rate of change

TYS unit 11b p. 104-106
Q1 is a basic question which everyone should be able to complete!
Q2 has been discussed i nyour weekend assignment. Hope you still remember!
Q3 Similar to your HW from ME15.
Q4 Not in your syllabus. NO need to complete.
Q5 Similar to example 3 in your TYS (p.104)
Q6 NOt in your syllabus. NO need to complete.

I will collect your HW during flag raising. Please be ready with your HW in your hand.

THERE WILL BE CONSEQUENCES FOR BEING NOT SERIOUS IN YOUR WORK AND NOT RESPONSIBLE FOR YOUR OWN LEARNING!
YOU REAP WHAT YOU SOW!

homework and things to bring 5/2/09

Todays hw:
A math tys differentiation - rate of change all questions except those that mdm lo pointed out at the next post

geography paper on rivers

Tomrrows lessons:
mother tongue , a math , english , socials studies

REMEMBER!!!
the A math tys hw will be collected during flag raising so complete it at home don't wait until the next day to do it in school..

p.s
to mdm lo... the disappoint thing is a typo error.. i forgot the don't behind...

Your weekend homework.

I know some of you have problems with your weekend HW.

So, I will offer some help here:

E Math

TYS Q10b. You must find out what is the number of litres of oil left after leak.
ans: (500/x)-3.
The cost of the paraffin is now $x+1.
Hence, to calculate the money he received from selling the paraffin, you must multiply (500/x)-3 by x+1. (hint: Make it a single fraction)

A Math worksheet

Q2 Ht of cylinder is thrice its radius.


Q4


Hope you find the above clues helpful.

Comparing coefficient method

Here is the comparing coefficient method.
If you have any queries, please post in the comments.

Tips for the coming common test

1. Complete the TYS questions which I assigned.

These are typical questions which are very popular. I bet the common test question on quadratic problem sum will be similar.

I will post the solutions here on Sunday night. You may check your steps here.
Bear in mind that I will be collecting the HW for checking and there will be consequences for not being responsible in your own learning. I can only show you teh way. You have to slay your own dragon.

2. Look at the corrections for Block test one, pay special attention to the new steps(which I said were Miss Tay's steps) in rewriting a quadratic expression as A(x-B)^2+C. This method is also called comparing coefficient. I am sure you can find some questions in the TYS which will allow you to practise this method.

3. Practise inputing data into your calculator. Learn how to analyse and compare mean and SD and the implications. e.g. if mean is same, SD1>SD2, what does it imply?
Look at examples from your textbook and class notebooks.

And.....bring workbook on Monday!!!!!!!!!!!!! please spread this message if you happen to see it!

.....how did i find the test...?

The test was okay for me but i'm not sure how did the rest of the class find the test...but on the overall of the test in my view, i think it was okok..can do..but i still need a lot of practice on my differentiation..

answer =)

a. 1/4
b. 1/2
c.1/4

Greetings....

Heymath Elearning 28 Jan

2 coin tossing event??




Calculate the probability for

a. getting 2 heads

b. getting 1 head and 1 tail

c. getting 2 tails

Akan Datang Coming Soon 即将来临

Elementary Mathematics Common Test

5th Feb (Thu) during ACT
Topics to be tested:
1. Completing the sqaure
2. Standard deviation
3. Quadratic Problem sums

Additional Mathematics Block Test

12th Feb (Thu) during ACT
Topics to be tested
1. Solving simple Trigonometric equations
2. Differentiation (Ch. 14)
3. Rate of Change (Ch. 15)

Happy Lunar New Year!

Being MIA for such a long time is indeed one of my deepest regrets.

Your Guru hereby wishes all of you a Happy Year of the Ox!
May all of you be as tenacious and strong as an ox.
Strong in the mind as well as body!

We will all work hard together and ace our N and O levels!!!!!!!!!!!!!