JEE Math Practice Question
Let a be an integer such that $$\mathop {\lim }\limits_{x \to 7} {{18 - [1 - x]} \over {[x - 3a]}}$$ exists, where [t] is greatest integer $$\le$$ t. Then a is equal to :
- A.$$-$$6
- B.$$-$$2
- C.2
- D.6
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