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# Algebra groups watch

1. Hi, I'm having a problem with proving that the associative th property and finding an identity element for this?
Any help will be much appreciated
2. DFranklin
ghostwalker
3. (Original post by maths10101)

Hi, I'm having a problem with proving that the associative th property and finding an identity element for this?
Any help will be much appreciated
I'm not DFranklin or Ghostwalker, but I'll have a bash anyway:

Associativity: Let's compute:

Now let's do:

Now try expanding the above out and using your indices rule to show that it's the same as the first equation.

Does this help?
4. (Original post by Zacken)
I'm not DFranklin or Ghostwalker, but I'll have a bash anyway:

Associativity: Let's compute:

Now let's do:

Now try expanding the above out and using your indices rule to show that it's the same as the first equation.

Does this help?
Hi yeah, that's great thanks! I got the answer in the end and comparing my work to yours has made me certain it's correct...thanks!
5. (Original post by maths10101)
Hi yeah, that's great thanks! I got the answer in the end and comparing my work to yours has made me certain it's correct...thanks!
Do you still need help with the identity, or...?
6. (Original post by Zacken)
Do you still need help with the identity, or...?
Nah that's fine, I got the identity as being 0 bro

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