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(Choose 1 answer)
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☐ A
A. (ii)
B. (i)
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C. (iv)
D. (iii)
Which of the following is a function?
(i) f:ZxZ→Z, f(m,n)=|√m+n]
(ii) f: ZxZ→ Z,
(iii) f:ZxZZ,
m
f(m, n)= +n
2
f(m,n)= | m±n
2
(iv)f:ZxZ→Z, f(m,n)=|vm|vn
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