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Question

If f:RR is defined by f(x)=x[x]+14, where [x] is the greaterst integer not exceeding x, then the set {xR:f(x)=14} is equal to

A
Q, the set of all rational numbers
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B
N, the set of all natural numbers
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C
W, the set of all whole numbers
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D
Z, the set of all integers
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