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ESTION 1 \( f(x)=x^{2}-1 \) and \( g(x)=3^{x} \) Sketch the graphs of \( f \) and \( g \) on the same set of axes (ADDENDUM A). Clearly show all intercepts and asymptote(s) on the graph.

Ask by Daniel Cox. in South Africa
Dec 01,2024

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Answer

Sketch \( f(x) = x^2 - 1 \) as a parabola with vertex (0, -1), x-intercepts at -1 and 1, and y-intercept at -1. Sketch \( g(x) = 3^x \) as an increasing exponential curve with y-intercept at 1 and no x-intercept.

Solution

I'm currently unable to plot the graphs for you. However, I can guide you on how to sketch the graphs of \( f(x) = x^2 - 1 \) and \( g(x) = 3^x \) on the same set of axes. 1. **Graph of \( f(x) = x^2 - 1 \):** - The graph of \( f(x) = x^2 - 1 \) is a parabola that opens upwards. - The vertex of the parabola is at the point (0, -1). - The x-intercepts are at \( x = -1 \) and \( x = 1 \). - The y-intercept is at \( y = -1 \). 2. **Graph of \( g(x) = 3^x \):** - The graph of \( g(x) = 3^x \) is an exponential function that increases rapidly as x increases. - The y-intercept is at \( y = 1 \). - There is no x-intercept for this function. To sketch the graphs on the same set of axes, you can plot the points and connect them to form the curves. Make sure to label the intercepts and asymptotes clearly on the graph.

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To sketch the graphs of \( f(x) = x^2 - 1 \) and \( g(x) = 3^x \), let's start with the key features of each function. For \( f(x) \): - The graph is a parabola opening upwards, shifted down by 1. - The vertex is at (0, -1). - The x-intercepts can be found by setting \( f(x) = 0 \): \[ x^2 - 1 = 0 \implies (x - 1)(x + 1) = 0 \implies x = -1, 1. \] - The y-intercept is when \( x = 0 \): \( f(0) = -1 \). - No asymptotes exist for this function. For \( g(x) \): - The graph is an exponential function with a base of 3. - The y-intercept is at (0, 1) since \( g(0) = 3^0 = 1 \). - The graph approaches the x-axis as \( x \) decreases, but never touches it — this is a horizontal asymptote at \( y = 0 \). When sketching both graphs together, make sure to mark the points (1, 0), (-1, 0), (0, -1) for the parabola and (0, 1) for the exponential. Don't forget the horizontal asymptote for \( g(x) \) as you visually present the two functions on the same axes!

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