Q. Letg(x)={(x−2)22−x2 for x≤2 for x>2Is g continuous at x=2 ?Choose 1 answer:(A) Yes(B) No
Check Left-hand Limit: To determine if g(x) is continuous at x=2, we need to check if the left-hand limit, the right-hand limit, and the value of the function at x=2 are all equal.
Calculate Left-hand Limit: First, let's find the left-hand limit as x approaches 2 from the left, which means we use the piece of the function defined for x≤2: limx→2−g(x)=limx→2−(x−2)2.
Check Right-hand Limit: Calculating the left-hand limit: limx→2−(x−2)2=(2−2)2=0.
Calculate Right-hand Limit: Now, let's find the right-hand limit as x approaches 2 from the right, which means we use the piece of the function defined for x > 2: limx→2+g(x)=limx→2+(2−x2).
Compare Limits: Calculating the right-hand limit: limx→2+(2−x2)=2−(22)=2−4=−2.
Check Value at x=2: Since the left-hand limit (0) is not equal to the right-hand limit (−2), g(x) is not continuous at x=2.
Calculate Value at x=2: Finally, let's check the value of the function at x=2. We can use either piece of the function since they should agree at x=2 if the function is continuous. Let's use the first piece: g(2)=(2−2)2=0.
Final Conclusion: The value of the function at x=2 (0) is equal to the left-hand limit (0) but not equal to the right-hand limit (−2). Therefore, g(x) is not continuous at x=2.