I need help with this hard maths question (2 Viewers)

[SpiralFlex]

You are missing a bit of contextual outline here.

In one of the tutoring posts Drongoski was named the Dog of maths.

 

[Carrotsticks]

You are missing a bit of contextual outline here.

In one of the tutoring posts Drongoski was named the Dog of maths.

That makes a lot more sense.

 

[denny94]

you guys are gun at maths ! the question asked was that a 3 unit question

 

[Drongoski]

You are missing a bit of contextual outline here.

In one of the tutoring posts Drongoski was named the Dog of maths.

I don't recall that. I was only suggesting that if there was a God of Maths maybe there ought to be a counterpart - wasn't suggesting that was me at all. Not vying for that tag.

 

[Drongoski]

I'm not 100% sure if it constitutes a 'proof'.

We can certainly use it to show a relationship is not an identity - because we only need 1 counter-example.

 

[Stabilo123]

It was a prelim 3u question

 

[someth1ng]

I'm pretty sure you don't get asked to prove that root 3 is irrational in 3U - only 4U I think.

 

[bladeys]

I'm pretty sure you don't get asked to prove that root 3 is irrational in 3U - only 4U I think.

.... OP clearly stated that it came from the Cambridge Year 11 3 unit textbook so how could it be 4u?

 

[Carrotsticks]

.... OP clearly stated that it came from the Cambridge Year 11 3 unit textbook so how could it be 4u?

Because many questions from the 3U textbook (especially Extension) are 4U level.

In fact, a very similar question from the Cambridge Year 11 3U Extension section appeared in a Sydney Boys Question 8 4U paper.

 

[SpiralFlex]

SBHS sometimes copies from textbook tomato sauces. I have seen a number of extension questions from Cambridge in their 4U examinations.

 

[someth1ng]

If it's from the Extension part of the 3U textbook then it probably is 4U-level or thereabout - the Extension are designed to be a challenge.

 

[bladeys]

If it's from the Extension part of the 3U textbook then it probably is 4U-level or thereabout - the Extension are designed to be a challenge.

Its not, OP said the question and page number, you can check for yourself