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\[ f(x)=9 \log _{8} x \] Domain: \( \square \) Asymptote: \( \square \) \( x \)-intercept: ( \( \square \) , 0) \( y \)-intercept: ( 0 , \( \square \) Question Help: Video eBook

Ask by Cummings Warren. in the United States
Mar 12,2025

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**Domain:** \( x > 0 \) **Asymptote:** \( x = 0 \) **\( x \)-intercept:** \( (1, 0) \) **\( y \)-intercept:** None

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**Domain** Since the logarithmic function is defined only for positive values of \( x \), the domain is \[ x > 0 \quad \text{or} \quad (0,\infty) \] **Asymptote** The vertical asymptote of a logarithmic function occurs where the argument of the logarithm is zero. Since \(\log_8 x\) is undefined at \( x=0 \), the vertical asymptote is \[ x = 0 \] **\( x \)-intercept** The \( x \)-intercept occurs when \( f(x)=0 \). Setting the function equal to zero: \[ 9 \log_8 x = 0 \] Divide both sides by 9: \[ \log_8 x = 0 \] Recall that \(\log_b a=0\) implies \(a=1\); therefore: \[ x = 1 \] Thus, the \( x \)-intercept is at \[ (1, 0) \] **\( y \)-intercept** The \( y \)-intercept is typically found by evaluating \( f(0) \). However, since \( x=0 \) is not in the domain of the function, there is no \( y \)-intercept. \[ \text{There is no } y\text{-intercept.} \]

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The domain of the function \( f(x) = 9 \log_{8} x \) consists of all positive real numbers, which means \( x > 0 \). This is because the logarithm is only defined for positive inputs. So, the domain can be expressed as \( (0, \infty) \). As for the asymptote, logarithmic functions have a vertical asymptote at the line \( x = 0 \). This is due to the fact that as \( x \) approaches zero from the right, \( f(x) \) will tend to negative infinity. So, the vertical asymptote is at \( x = 0 \). For the \( x \)-intercept, you can find this point by setting \( f(x) = 0 \): \( 0 = 9 \log_{8} x \). This implies \( \log_{8} x = 0 \), which leads to \( x = 1 \). Thus, the \( x \)-intercept is at (1, 0). To find the \( y \)-intercept, set \( x = 1 \): \[ f(1) = 9 \log_{8}(1) = 9 \times 0 = 0 \]. However, since the logarithm of zero or negative numbers is undefined, we can conclude there is no `y`-intercept in the traditional sense as it refers to a vertical crossing on a function graphed on the Cartesian plane. In conclusion, to wrap it up, we have: Domain: \( (0, \infty) \) Asymptote: \( x = 0 \) \( x \)-intercept: (1, 0) \( y \)-intercept: Not applicable (or could be (0,0) if evaluated at the neutral position).

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