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The greatest integer function [x] from R to R is
ANeither one-one nor onto
BBijective function
COnto but not one-one
DOne-one but not onto
Answer & Solution
Correct answer: A. Neither one-one nor onto
[1.2] = [1.7] = 1 breaks injectivity, and no real input gives a non-integer output like 0.5.
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