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Psychology

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My apologies for the previous incorrect response. I will now answer the question in the image provided.

The question asks to find the value of kk for which the function f(x)f(x) is continuous at x=2x=2.

The function is given by: f(x)={x2βˆ’4xβˆ’2forxβ‰ 2kforx=2f(x) = \begin{cases} \frac{x^{2} - 4}{x - 2} & for x \neq 2 \\ k & for x = 2 \end{cases}

For f(x)f(x) to be continuous at x=2x=2, the following condition must be satisfied: lim⁑xβ†’2f(x)=f(2)\lim_{x \to 2} f(x) = f(2)

Step 1: Find f(2)f(2). From the definition of the function, when x=2x=2, f(x)=kf(x) = k. So, f(2)=kf(2) = k.

Step 2: Find lim⁑xβ†’2f(x)\lim_{x \to 2} f(x). For xβ‰ 2x \neq 2, f(x)=x2βˆ’4xβˆ’2f(x) = \frac{x^{2} - 4}{x - 2}. We can factor the numerator: x2βˆ’4=(xβˆ’2)(x+2)x^{2} - 4 = (x - 2)(x + 2). So, for xβ‰ 2x \neq 2: f(x)=(xβˆ’2)(x+2)xβˆ’2=x+2f(x) = \frac{(x - 2)(x + 2)}{x - 2} = x + 2 Now, we can find the limit: lim⁑xβ†’2f(x)=lim⁑xβ†’2(x+2)\lim_{x \to 2} f(x) = \lim_{x \to 2} (x + 2) Substitute x=2x=2 into the expression: lim⁑xβ†’2(x+2)=2+2=4\lim_{x \to 2} (x + 2) = 2 + 2 = 4

Step 3: Equate the limit to f(2)f(2) to find kk. For continuity at x=2x=2: lim⁑xβ†’2f(x)=f(2)\lim_{x \to 2} f(x) = f(2) 4=k4 = k

The value of kk for which the function is continuous at x=2x=2 is βˆ—4βˆ—\boxed{*4*}.

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