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VCE 12 Methods 2023

4.07 Graphs of logarithms

Interactive practice questions

Consider the function $y=\log_4x$y=log4x, the graph of which has been sketched below.

Loading Graph...

a

Complete the following table of values.

$x$x $\frac{1}{16}$116 $\frac{1}{4}$14 $4$4 $16$16 $256$256
$y$y $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$ $\editable{}$
b

Determine the $x$x-value of the $x$x-intercept of $y=\log_4x$y=log4x.

c

How many $y$y-intercepts does $\log_4x$log4x have?

d

Determine the $x$x value for which $\log_4x=1$log4x=1.

Easy
3min

Consider the two graphs sketched below.

Easy
< 1min

Consider the graphs shown below.

Easy
< 1min

We are going to sketch the graph of $y=\log_2x$y=log2x.

Easy
4min
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Outcomes

U34.AoS1.2

graphs of the following functions: power functions, y=x^n; exponential functions, y=a^x, in particular y = e^x ; logarithmic functions, y = log_e(x) and y=log_10(x) ; and circular functions, 𝑦 = sin(𝑥) , 𝑦 = cos (𝑥) and 𝑦 = tan(𝑥) and their key features

U34.AoS1.14

identify key features and properties of the graph of a function or relation and draw the graphs of specified functions and relations, clearly identifying their key features and properties, including any vertical or horizontal asymptotes

U34.AoS1.11

the concept of an inverse function, connection between domain and range of the original function and its inverse relation and the conditions for existence of an inverse function, including the form of the graph of the inverse function for specified functions

U34.AoS1.18

sketch by hand graphs of polynomial functions up to degree 4; simple power functions, y=x^n where n in N, y=a^x, (using key points (-1, 1/a), (0,1), and (1,a); log x base e; log x base 10; and simple transformations of these

U34.AoS2.2

functions and their inverses, including conditions for the existence of an inverse function, and use of inverse functions to solve equations involving exponential, logarithmic, circular and power functions

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