# Helpp

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#1
I’m not sure how to do 2 Attachment 802982Attachment 802984
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1 year ago
#2
(Original post by Fayeeeee)
I’m not sure how to do 2
An odd number represented algebraically is , so what is ?
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#3
(Original post by RDKGames)
An odd number represented algebraically is , so what is ?
is that right
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#4
(Original post by RDKGames)
An odd number represented algebraically is , so what is ?
Also I don’t really understand 5
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1 year ago
#5
(Original post by Fayeeeee)
is that right
Yeah that's right. To show that it's an odd number, you should explicitly try and get it into the form:

.
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1 year ago
#6
(Original post by Fayeeeee)
Also I don’t really understand 5
Look at the LHS. Is it an even or an odd number??

Then that must be the case for the RHS, and since 5 is an odd number, it leaves only one option as to whether is even or odd.
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#7
(Original post by RDKGames)
Yeah that's right. To show that it's an odd number, you should explicitly try and get it into the form:

.
Ahh okay thanks
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#8
(Original post by RDKGames)
Look at the LHS. Is it an even or an odd number??

Then that must be the case for the RHS, and since 5 is an odd number, it leaves only one option as to whether is even or odd.
I know x is an odd number but I don’t understand how to get it into that from
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1 year ago
#9
(Original post by Fayeeeee)
I know x is an odd number but I don’t understand how to get it into that from
You don't need to get into the form , if that's what you're asking.

In this question you don't use algebra to answer it so no need to introduce that form.
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#10
(Original post by RDKGames)
You don't need to get into the form , if that's what you're asking.

In this question you don't use algebra to answer it so no need to introduce that form.
I don’t know what to do, do I rearrange idk
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1 year ago
#11
(Original post by Fayeeeee)
I don’t know what to do, do I rearrange idk
You just said you know that is odd. [which I'm interpreting as you telling me you have logically deduced this is true]

You have answered the question and don't need to do anything further!
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#12
(Original post by RDKGames)
You just said you know that is odd. [which I'm interpreting as you telling me you have logically deduced this is true]

You have answered the question and don't need to do anything further!
I need to put it into this form
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1 year ago
#13
(Original post by Fayeeeee)
I need to put it into this form
Ok, well they took the algebraic approach.

Do you understand how to start at and rearrange for , first of all?
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#14
(Original post by RDKGames)
Ok, well they took the algebraic approach.

Do you understand how to start at and rearrange for , first of all?
No😂
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1 year ago
#15
(Original post by Fayeeeee)
No😂
Expand the LHS first.

Then have a go.
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#16
(Original post by RDKGames)
Expand the LHS first.

Then have a go.
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1 year ago
#17
(Original post by Fayeeeee)
...
Come on...

Subtract from both sides...
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#18
(Original post by RDKGames)
Come on...

Subtract from both sides...
i don’t understand why in the mark scheme the brackets has n+2 as u thought odd numbers could only be n+1,n+3 for example
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#19
(Original post by Fayeeeee)
i don’t understand why in the mark scheme the brackets has n+2 as u thought odd numbers could only be n+1,n+3 for example
I meant as I
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1 year ago
#20
(Original post by Fayeeeee)
i don’t understand why in the mark scheme the brackets has n+2 as u thought odd numbers could only be n+1,n+3 for example
No, odd numbers (as I've mentioned previously!) are of the form so in this question, the 'something' is precisely .

This 'something' can be whatever as long as it's an integer, and is definitely an integer. So that's no issue!
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