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A function equals (x^2 - 9)/(x - 3) for x not equal to 3 and has value k at x = 3. It is continuous at 3 when k is
A6
B9
C0
D3
Answer & Solution
Correct answer: A. 6
For x not 3 the function equals x + 3, whose limit at 3 is 6, so k must be 6.
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