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Let

g(x)={[5-x," for "x <= 3],[2e^(3-x)," for "x > 3]:}
Is 
g continuous at 
x=3 ?
Choose 1 answer:
(A) Yes
(B) 
No

Let\newlineg(x)={5xamp; for x32e3xamp; for xgt;3 g(x)=\left\{\begin{array}{ll}5-x &amp; \text { for } x \leq 3 \\ 2 e^{3-x} &amp; \text { for } x&gt;3\end{array}\right. \newlineIs g g continuous at x=3 x=3 ?\newlineChoose 11 answer:\newline(A) Yes\newline(B) No \mathrm{No}

Full solution

Q. Let\newlineg(x)={5x for x32e3x for x>3 g(x)=\left\{\begin{array}{ll}5-x & \text { for } x \leq 3 \\ 2 e^{3-x} & \text { for } x>3\end{array}\right. \newlineIs g g continuous at x=3 x=3 ?\newlineChoose 11 answer:\newline(A) Yes\newline(B) No \mathrm{No}
  1. Check Left-Hand Limit: To determine if g(x)g(x) is continuous at x=3x=3, we need to check if the left-hand limit, the right-hand limit, and the value of the function at x=3x=3 are all equal.
  2. Check Right-Hand Limit: First, we find the left-hand limit as xx approaches 33 from the left, which means we use the piece of the function defined for x3x \leq 3. We substitute x=3x=3 into the first piece of the function:\newlinelimx3g(x)=53=2.\lim_{x \to 3^-} g(x) = 5 - 3 = 2.
  3. Check Function Value at x=33: Next, we find the right-hand limit as xx approaches 33 from the right, which means we use the piece of the function defined for x > 3. We substitute x=3x=3 into the second piece of the function:\newlinelimx3+g(x)=2e33=2e0=2.\lim_{x \to 3^+} g(x) = 2e^{3-3} = 2e^0 = 2.
  4. Conclusion: Now, we check the value of the function at x=3x=3. Since x=3x=3 falls in the first piece of the function (x3x \leq 3), we use the first piece to find g(3)g(3):g(3)=53=2.g(3) = 5 - 3 = 2.
  5. Conclusion: Now, we check the value of the function at x=3x=3. Since x=3x=3 falls in the first piece of the function (x3x \leq 3), we use the first piece to find g(3)g(3):g(3)=53=2.g(3) = 5 - 3 = 2.Since the left-hand limit, the right-hand limit, and the value of the function at x=3x=3 are all equal to 22, the function g(x)g(x) is continuous at x=3x=3.

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