Daily Maths Challenges

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siriusmart@lemmy.world

[2024/06/30] Decimal expansion for real numbers (lemmy.world)

submitted 4 months ago by siriusmart@lemmy.world to c/dailymaths@lemmy.world

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[–] been_jamming@lemm.ee 2 points 4 months ago (2 children)

I think this question is very poorly worded

[–] ArmokGoB@lemmy.dbzer0.com 1 points 4 months ago (1 children)

I read the digits as being part of a product operator

[–] been_jamming@lemm.ee 1 points 4 months ago

Sure, but what is d_\infty? What is the set \infty? What does the question mean by "every real number can be represented by"? There's nothing distinguishing d_1d_2... with d_1 times d_2 since we normally denote the product by writing the variables next to each other