Maths question from 2011 hsc Mathmatics. (1 Viewer)

[girlworld_club]

I think this is the formula:



n is the number of terms
a is the first term
l is the last term

This is a question from the topic Series.

Do you learn the topic series in year 12 or ll?

 

[Gigacube]

Do you learn the topic series in year 12 or ll?

I learnt it in year 12. Which textbook does your school use?

 

[girlworld_club]

I learnt it in year 12. Which textbook does your school use?

maths in focus. I just decided to do some questions from hsc 2011 ( it looked very easy at first, like that sort of sc question that you make up your own formula to solve a problem). But everything i tried it didn't work.

 

[Gigacube]

maths in focus. I just decided to do some questions from hsc 2011 ( it looked very easy at first, like that sort of sc question that you make up your own formula to solve a problem). But everything i tried it didn't work.

If you use the old MiF then you'll learn part in year 11 & part in year 12. If you use the newer edition of MiF then you'll learn it in year 12.

I found Series one of the easier topics & it is very useful. It shouldn't be too hard to learnt it by yourself. Just do some practice questions on series & you'll get the hang of it. I think you should be able to do most of the topic with the year 11 knowledge so far. You may need to use logs for a few questions.

 

[girlworld_club]

If you use the old MiF then you'll learn part in year 11 & part in year 12. If you use the newer edition of MiF then you'll learn it in year 12.

I found Series one of the easier topics & it is very useful. It shouldn't be too hard to learnt it by yourself. Just do some practice questions on series & you'll get the hang of it. I think you should be able to do most of the topic with the year 11 knowledge so far. You may need to use logs for a few questions.

like this question?

 

[Bored_of_HSC]

maths in focus. I just decided to do some questions from hsc 2011 ( it looked very easy at first, like that sort of sc question that you make up your own formula to solve a problem). But everything i tried it didn't work.

Worst textbook tbh lol. Make sure you supplement your learning with questions from other textbooks.

 

[Gigacube]

like this question?

I don't think you'd need logs for this question. I'll show you another question later that requires logs.

 

[girlworld_club]

Worst textbook tbh lol. Make sure you supplement your learning with questions from other textbooks.

what textbook do you suggest?

 

[4025808]

what textbook do you suggest?

Fitzpatrick for 2U.

For other topics, use Terry Lee Fundamentals of Mathematics.

 

[dalonga]

I am a prelim student, trying to do some hsc work so excuse the unfamiliarity.

A skyscraper of 110 floors is to be built. The first floor to be built will cost $3 million. The cost of building each subsequent floor will be $0.5 million more than the floor immediately below.
(i)
What will be the cost of building the 25th floor?
2
(ii)
What will be the cost of building all 110 floors of the skyscraper?


To find out my answer i re-arranged to make this formula:
3,000,000 + (f x 500000) - 500000
where f = the number of floors

is this the right approach to answering the question, or does it produce the wrong answer? any other ways of doing it?

(i) t1 = 3 , d = 0.5 , t25 = 3 + 24× 0.5 = 15 , $15 million

(ii) S110=110/2(2×3+109×0.5)=3327.5,$3327.5 million

 

[carpe_diem]

Fitzpatrick for 2U.

For other topics, use Terry Lee Fundamentals of Mathematics.

I got told Fitzpatrick is outdated. Is the Cambridge one any good?

 

[Gigacube]

I got told Fitzpatrick is outdated. Is the Cambridge one any good?

Cambridge is very good IMO. There's a year 11 & 12 book. Some topics that are done in the year 11 MiF book may be covered in the Cambridge year 12 book. As for Fitzpatrick, it covers the whole 2 Unit Mathematics course. Take a look at this thread comparing textbooks.

 

[SpiralFlex]

Use Cambridge/Fitzpatrick + Past paper. Really you don't need more than one textbook. I love out of date textbooks! Way more detailed! *Sighs* Computer generation...

Also there's no 2U "Fundamentals". It's strictly for 3U students.

 

[Gigacube]

like this question?

Here's an example of a basic question in series that involves the use of logs.

Question:
The nth term of a series is given by the formula:

Which term of the series is equal to 4095?

Answer:
















Note that:

 

[SpiralFlex]

Here's an example of a basic question in series that involves the use of logs.

Question:
The nth term of a series is given by the formula:

Which term of the series is equal to 4095?

Answer:
















Note that:

Sure about last line?

 

[Gigacube]

Sure about last line?

Lol, I fixed it. I think.

 

[SpiralFlex]

Strictly speaking you can't leave out a variable. When you are defining log base e to equal ln



Sorry I am picky today. Be right back, more sugar.

 

[Gigacube]

Strictly speaking you can't leave out a variable. When you are defining log base e to equal ln



Sorry I am picky today. Be right back, more sugar.

Thanks Spiral.

 

[SpiralFlex]

Gum gum gum gum! Hehehehehe

I need to figure out the purpose of this thread, I forgot the title.

 

[Gigacube]

Gum gum gum gum! Hehehehehe

I need to figure out the purpose of this thread, I forgot the title.

Series!