Q. Determine whether the function f(x) is continuous at x=3.f(x)={10−3x2,−5+3x,x<−3x≥−3f(x) is discontinuous at x=3f(x) is continuous at x=3
Check Function Definition: To determine if the function f(x) is continuous at x=3, we need to check if the following three conditions are met:1. The function is defined at x=3.2. The limit of f(x) as x approaches 3 exists.3. The limit of f(x) as x approaches 3 is equal to the function value at x=3.
Find Left Limit: First, let's check if the function is defined at x=3. We look at the piece of the function that applies when x is greater than or equal to −3, which is f(x)=−5+3x. Plugging in x=3, we get f(3)=−5+3(3)=−5+9=4. So, the function is defined at x=3.
Find Right Limit: Next, we need to find the limit of f(x) as x approaches 3 from the left and from the right. For x approaching 3 from the left, we use the piece of the function for x≥−3, which is f(x)=−5+3x. The limit as x approaches 3 from the left is the same as the function value at x=3, which we already calculated as x0.
Verify Continuity: Now, we find the limit of f(x) as x approaches 3 from the right. Since there is no piece of the function defined for x > 3, we use the same piece as for the left-hand limit, f(x)=−5+3x. The limit as x approaches 3 from the right is also 4.
Verify Continuity: Now, we find the limit of f(x) as x approaches 3 from the right. Since there is no piece of the function defined for x > 3, we use the same piece as for the left-hand limit, f(x)=−5+3x. The limit as x approaches 3 from the right is also 4.Since the left-hand limit and the right-hand limit as x approaches 3 are both equal to 4, and the function value at x1 is also 4, all three conditions for continuity are satisfied. Therefore, the function f(x) is continuous at x1.
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