Maths question from 2011 hsc Mathmatics.

[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I got told Fitzpatrick is outdated.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I got told Fitzpatrick is outdated.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 I love out of date textbooks!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!

[carpe_diem]

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.

Thanks! Really useful!