Logarithms - Exercise Quiz
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Logarithms - Exercise Quiz

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Questions and Answers

What is the value of $log_2(3)$ if $log_2 = 0.3$ and $log_3 = 0.48$?

  • 0.625 (correct)
  • 0.5
  • 1.6
  • 0.75
  • The change of base formula states that $log_a(b) = \frac{log_c(b)}{log_c(a)}$ for any base $c$.

    True

    Evaluate $log_2(17)$ using the values $log_2 = 0.3$ and $log_3 = 0.48$. What is the answer?

    1.23

    The property of logarithms that states $log_a(xy) = log_a(x) + log_a(y)$ is known as the ______ property.

    <p>product</p> Signup and view all the answers

    Match the following logarithmic expressions with their properties:

    <p>log_a(xy) = log_a(x) + log_a(y) log_a(x/y) = log_a(x) - log_a(y) log_a(x^n) = n * log_a(x) log_a(b) = Change of base formula</p> Signup and view all the answers

    What is the value of $log_5(11)$ using the change of base formula?

    <p>1.24</p> Signup and view all the answers

    The equation $log_a(b) imes log_b(a) = 1$ is a valid property of logarithms.

    <p>True</p> Signup and view all the answers

    Evaluate $log_3(8) × log_2(9)$. Provide the answer in terms of logarithms.

    <p>log_2(8) × log_3(9)</p> Signup and view all the answers

    The natural logarithm is denoted as ___.

    <p>ln</p> Signup and view all the answers

    Match the logarithmic expressions with their properties:

    <p>log_a(xy) = log_a(x) + log_a(y) log_a(x/y) = log_a(x) - log_a(y) log_a(x^b) = b * log_a(x)</p> Signup and view all the answers

    Which graph represents the function $y = 2^x$?

    <p>An increasing exponential curve</p> Signup and view all the answers

    The logarithmic function $y = log_2(x)$ increases as x increases.

    <p>True</p> Signup and view all the answers

    To evaluate logarithmic expressions with a calculator, one usually uses the buttons for ___.

    <p>log or ln</p> Signup and view all the answers

    Which property of logarithms is used to combine the expression $\log_{9}x + \log_{9}x^{2} + \log_{9}x^{3} + \log_{9}x^{4} = 5$?

    <p>Product Rule</p> Signup and view all the answers

    The equation $\log_{4}x - \log_{4}7 = \frac{3}{2}$ can be simplified using the Quotient Rule.

    <p>True</p> Signup and view all the answers

    What is the value of $x$ if $\log_{9}4 + \log_{3}x = 3$?

    <p>27</p> Signup and view all the answers

    The equation $\log_{2}x - \log_{8}x = 4$ can be solved by applying the __________ property of logarithms.

    <p>Change of Base</p> Signup and view all the answers

    Match the logarithmic equations with their solutions:

    <p>$\log_{5}x + 2\log_{5}x = 3$ = x = 25 $\log_{4}x - \log_{4}7 = \frac{3}{2}$ = x = 7 * 4^(3/2) $\log_{9}4 + \log_{3}x = 3$ = x = 27 $\log_{2}x - \log_{8}x = 4$ = x = 128</p> Signup and view all the answers

    Which of the following logarithmic identities is incorrect?

    <p>$\log_{9}9 = 1$</p> Signup and view all the answers

    Using a calculator, the natural logarithm can be directly calculated for any given positive number.

    <p>True</p> Signup and view all the answers

    How would you express $\log_{5}x + 2\log_{5}x$ using the properties of logarithms?

    <p>3\log_{5}x</p> Signup and view all the answers

    Study Notes

    Logarithms - Exercise

    • Converting to exponential form: Write logarithmic statements in the form ax = y.

      • Example: logmc = d becomes md = c
      • Example: logbp = q becomes bq = p
    • Finding the value of x: Solve equations involving logarithms to find the value of x.

      • Example: log28 = x becomes 2x = 8 , so x = 3
      • Example: logx16 = 0.5 becomes x0.5 = 16, so x = 162 = 256
    • Evaluating logarithmic expressions: Calculate the values of logarithmic expressions.

      • Example: log232 = 5, log636=2, log84 = 1.68
    • Expressing in terms of loga, logb, logc: Rewrite expressions in terms of these logarithms.

      • Example: log(abc) = loga + logb + logc
      • Example: loga2bc = 2loga + logb + logc
    • Expressing as a single logarithm: Combine multiple logarithmic terms into one.

      • Example: 2log5 + log4 – log10 = log(52 x 4 / 10)
    • Converting to log form: Change exponential expressions to equivalent logarithmic expressions.

    • Solving logarithmic equations: Find the value of the variable in equations containing logarithms.

    • Use of calculator for logarithms: Techniques to find approximate values of x given equations involving logarithms. -Example Find x, if log x=0.32

    • Relationship between logarithms: Show that logb×logħa=1

    • Graphical representation: Understand logarithmic relationships visually. Plot graphs of logarithmic and exponential functions.

    • Solving simultaneous equations with logarithms: Solving systems of equations involving logarithm expressions.

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    Algebra 8 Exercise (2) PDF

    Description

    Test your understanding of logarithms with this exercise quiz. You will convert logarithmic statements to exponential form, solve equations, evaluate logarithmic expressions, and rewrite them in new terms. Challenge yourself with a variety of problems to strengthen your skills in logarithmic functions.

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