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Let

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

Let\newlineh(x)={2x1amp; for xlt;121xamp; for x1 h(x)=\left\{\begin{array}{ll} 2^{x-1} &amp; \text { for } x&lt;1 \\ 2^{1-x} &amp; \text { for } x \geq 1 \end{array}\right. \newlineIs h h continuous at x=1 x=1 ?\newlineChoose 11 answer:\newline(A) Yes\newline(B) No

Full solution

Q. Let\newlineh(x)={2x1 for x<121x for x1 h(x)=\left\{\begin{array}{ll} 2^{x-1} & \text { for } x<1 \\ 2^{1-x} & \text { for } x \geq 1 \end{array}\right. \newlineIs h h continuous at x=1 x=1 ?\newlineChoose 11 answer:\newline(A) Yes\newline(B) No
  1. Check Left Limit: To determine if h(x)h(x) is continuous at x=1x=1, we need to check if the left-hand limit as xx approaches 11, the right-hand limit as xx approaches 11, and the value of the function at x=1x=1 are all equal.
  2. Calculate Left Limit: First, we calculate the left-hand limit, which is the limit of h(x)h(x) as xx approaches 11 from the left. Since x < 1, we use the first part of the function definition: h(x)=2(x1)h(x) = 2^{(x-1)}.\newlineSo, we need to find the limit of 2(x1)2^{(x-1)} as xx approaches 11 from the left.\newlinelimx12(x1)=2(11)=20=1\lim_{x \to 1^-} 2^{(x-1)} = 2^{(1-1)} = 2^0 = 1.
  3. Calculate Right Limit: Next, we calculate the right-hand limit, which is the limit of h(x)h(x) as xx approaches 11 from the right. Since x1x \geq 1, we use the second part of the function definition: h(x)=2(1x)h(x) = 2^{(1-x)}.\newlineSo, we need to find the limit of 2(1x)2^{(1-x)} as xx approaches 11 from the right.\newlinelimx1+2(1x)=2(11)=20=1\lim_{x \to 1^+} 2^{(1-x)} = 2^{(1-1)} = 2^0 = 1.
  4. Find Value at x=1x=1: Now, we need to find the value of the function at x=1x=1. Since x=1x=1 is the point where the definition of the function changes, we need to check both parts of the function definition.\newlineFor x < 1, h(x)=2(x1)h(x) = 2^{(x-1)}, so h(1)=2(11)=20=1h(1) = 2^{(1-1)} = 2^0 = 1.\newlineFor x1x \geq 1, h(x)=2(1x)h(x) = 2^{(1-x)}, so h(1)=2(11)=20=1h(1) = 2^{(1-1)} = 2^0 = 1.\newlineBoth parts of the function give the same value at x=1x=1, which is x=1x=100.
  5. Check Continuity: Since the left-hand limit, the right-hand limit, and the value of the function at x=1x=1 are all equal to 11, the function h(x)h(x) is continuous at x=1x=1.

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