- #1

tim656

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i let G be an infinite group for all R_5 ( multiplication modulo 5) within this interval [1,7)

so i got |2|=|3|=4.

i'm not sure this is the right answer but i couldn't think of anything else at a moment. help please.

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- Thread starter tim656
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- #1

tim656

- 1

- 0

i let G be an infinite group for all R_5 ( multiplication modulo 5) within this interval [1,7)

so i got |2|=|3|=4.

i'm not sure this is the right answer but i couldn't think of anything else at a moment. help please.

- #2

SammyS

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Hello tim656. Welcome to PF !what is an infinite group that has exactly two elements with order 4?

i let G be an infinite group for all R_5 ( multiplication modulo 5) within this interval [1,7)

so i got |2|=|3|=4.

I'm not sure this is the right answer but i couldn't think of anything else at a moment. help please.

Think about some subset of the complex numbers.

What are the multiples of the imaginary unit, i ?

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