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Give an example of a sequence x such that the range of x has exactly 3 elements.
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a sequence is only a function so for instance you could have \[ \large x_j=j\mod 3 \] i mean x_j is equal to the residue of dividing j into 3. this way the range of x is 0, 1 and 2
Well, it's a function with the domain being the natural numbers. Mod 3 is a nice example, of course.
I dont know anything about mod, can you explain a little?
nm got it ty
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