$lim x \to a - f (x) = 11$ and f(x)=2x+3. If f(x) is a continuous function, the value of a is .

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Solution

The correct option is A 4
For a continuous function f(x),
$lim x \to a - f (x) = lim x \to a + f (x) = f (a) \Rightarrow 2 a + 3 = 11 \Rightarrow a = 4$

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