Specify and control how Mathematica formats its output, including rich text, equations and graphics.

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I get weird <<…>> symbols in my output — what does it mean?

After I input the following: data = Table[{3 + i + RandomReal[{-3, 7}], i + RandomReal[{-2, 5}]}, {i, 1, 20}]; model = LinearModelFit[data, x, x] I got ...
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How can I solve precision problem [duplicate]

I want to set 2 decimal places, whether it's real Number or anything.for that purpose I wrote the following function. ...

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