Determine whether the function f(x) is continuous at x=5.f(x)={12−x2,−9−x,amp;xamp;x≥5lt;5f(x) is continuous at x=5Submit Answerf(x) is discontinuous at x=5
Q. Determine whether the function f(x) is continuous at x=5.f(x)={12−x2,−9−x,x<5x≥5f(x) is continuous at x=5Submit Answerf(x) is discontinuous at x=5
Check Conditions: To determine if the function f(x) is continuous at x=5, we need to check if the following three conditions are met:1. The function is defined at x=5.2. The limit of f(x) as x approaches 5 from the left (limx→5−f(x)) equals the limit of f(x) as x approaches 5 from the right (x=50).3. The limit of f(x) as x approaches 5 equals the function value at x=5 (x=55).
Find f(5): First, let's find the function value at x=5. Since 5 is not less than 5, we use the piece of the function defined for x≥5, which is f(x)=−9−x.f(5)=−9−5=−14.
Calculate limx→5−f(x): Next, we calculate the limit of f(x) as x approaches 5 from the left. For x < 5, the function is defined as f(x)=12−x2.limx→5−f(x)=limx→5−(12−x2)=12−(5)2=12−25=−13.
Calculate limx→5+f(x): Now, we calculate the limit of f(x) as x approaches 5 from the right. For x≥5, the function is defined as f(x)=−9−x.limx→5+f(x)=limx→5+(−9−x)=−9−5=−14.
Compare Limits: We compare the left-hand limit, right-hand limit, and the function value at x=5. We found that:limx→5−f(x)=−13limx→5+f(x)=−14f(5)=−14Since the left-hand limit does not equal the right-hand limit, the function is not continuous at x=5.
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