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
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[2024/06/30] Decimal expansion for real numbers | Spyke
Hint: ::: spoiler spoiler The size of a set is the number of possible values that an element can take. :::
::: spoiler spoiler solution: https://gmtex.siri.sh/fs/1/School/Extra/Maths/Qotd%20solutions/2024-06-30_sizes-of-real-sets.html :::
I think this question is very poorly worded
I read the digits as being part of a product operator
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