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Determine whether the function 
f(x) is continuous at 
x=6.

f(x)={[16-x^(2)",",x < 6],[-2-3x",",x >= 6]:}

f(x) is discontinuous at 
x=6

f(x) is continuous at 
x=6

Determine whether the function f(x) f(x) is continuous at x=6 x=6 .\newlinef(x)={16x2,amp;xlt;623x,amp;x6 f(x)=\left\{\begin{array}{ll} 16-x^{2}, &amp; x&lt;6 \\ -2-3 x, &amp; x \geq 6 \end{array}\right. \newlinef(x) f(x) is discontinuous at x=6 x=6 \newlinef(x) f(x) is continuous at x=6 x=6

Full solution

Q. Determine whether the function f(x) f(x) is continuous at x=6 x=6 .\newlinef(x)={16x2,x<623x,x6 f(x)=\left\{\begin{array}{ll} 16-x^{2}, & x<6 \\ -2-3 x, & x \geq 6 \end{array}\right. \newlinef(x) f(x) is discontinuous at x=6 x=6 \newlinef(x) f(x) is continuous at x=6 x=6
  1. Check Function Definition: To determine if the function f(x)f(x) is continuous at x=6x=6, we need to check three conditions: \newline11. The function is defined at x=6x=6.\newline22. The limit of f(x)f(x) as xx approaches 66 exists.\newline33. The limit of f(x)f(x) as xx approaches 66 is equal to the function value at x=6x=6.\newlineLet's start by checking if the function is defined at x=6x=6.
  2. Evaluate f(6)f(6): The function f(x)f(x) is defined piecewise, with one expression for x < 6 and another for x6x \geq 6. At x=6x=6, the function is defined by the second piece, f(x)=23xf(x) = -2 - 3x. Let's evaluate f(6)f(6).\newlinef(6)=23(6)=218=20f(6) = -2 - 3(6) = -2 - 18 = -20.\newlineSo, the function is defined at x=6x=6 and f(6)=20f(6) = -20.
  3. Calculate Left Limit: Next, we need to find the limit of f(x)f(x) as xx approaches 66 from the left, which is denoted as limx6f(x)\lim_{x\to6^-} f(x). For x < 6, f(x)=16x2f(x) = 16 - x^2. Let's calculate the limit.\newlinelimx6f(x)=limx6(16x2)=16(6)2=1636=20\lim_{x\to6^-} f(x) = \lim_{x\to6^-} (16 - x^2) = 16 - (6)^2 = 16 - 36 = -20.
  4. Calculate Right Limit: Now, we need to find the limit of f(x)f(x) as xx approaches 66 from the right, which is denoted as limx6+f(x)\lim_{x\to6^+} f(x). For x6x \geq 6, f(x)=23xf(x) = -2 - 3x. Let's calculate the limit.\newlinelimx6+f(x)=limx6+(23x)=23(6)=218=20\lim_{x\to6^+} f(x) = \lim_{x\to6^+} (-2 - 3x) = -2 - 3(6) = -2 - 18 = -20.
  5. Check Limit Existence: Since the limit from the left and the limit from the right both exist and are equal to each other, the limit of f(x)f(x) as xx approaches 66 exists and is equal to 20-20.
  6. Compare Limit and Function Value: Finally, we compare the limit of f(x)f(x) as xx approaches 66 to the function value at x=6x=6. Since both the limit and the function value at x=6x=6 are equal to 20-20, the function f(x)f(x) is continuous at x=6x=6.

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