Gr12 Mathematics: Ch 2.5 Exponential Functions

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Questions and Answers

What is the logarithmic rule for logarithmic functions?

  • Quotient Rule
  • Power Rule
  • Product Rule
  • Change of Base (correct)

What is the graph of the inverse function about?

  • x-axis
  • y-axis
  • origin
  • the line y = x (correct)

What is the formula to calculate the population growth?

  • A = P(1 + i)^n (correct)
  • A = P(1 / i)^n
  • A = P(1 * i)^n
  • A = P(1 - i)^n

What is the formula to calculate the pH level?

<p>pH = -log[H+] (C)</p> Signup and view all the answers

What is the domain of the exponential function f(x) = 10^x?

<p>x ∈ ℝ (D)</p> Signup and view all the answers

What is the application of logarithms in chemistry?

<p>pH levels (D)</p> Signup and view all the answers

What is the definition of an exponent?

<p>The number of times a base number is multiplied by itself. (B)</p> Signup and view all the answers

What happens to the graph of the exponential function f(x) = b^x when b > 1?

<p>The graph rises rapidly. (D)</p> Signup and view all the answers

What is the inverse of the function y = b^x?

<p>y = log_b x (C)</p> Signup and view all the answers

What is the definition of a logarithm?

<p>The exponent to which a base must be raised to yield x. (A)</p> Signup and view all the answers

How do you convert an exponential equation to a logarithmic equation?

<p>Interchange x and y, then solve for y. (B)</p> Signup and view all the answers

What is the shape of the graph of the logarithmic function y = log_b x?

<p>Increasing. (A)</p> Signup and view all the answers

What is the value of log_a 1?

<p>0 (D)</p> Signup and view all the answers

What is the value of log_a a?

<p>1 (D)</p> Signup and view all the answers

If logₐx = 2, what is the value of logₐ(x²)?

<p>2logₐx (C)</p> Signup and view all the answers

What is the asymptote of the graph of the logarithmic function f(x) = logx?

<p>x = 0 (C)</p> Signup and view all the answers

A population grows by 10% every year. If the current population is 10000, how many years will it take for the population to triple?

<p>15 years (D)</p> Signup and view all the answers

What is the value of log₁₀(1000)?

<p>3 (B)</p> Signup and view all the answers

What is the range of the exponential function f(x) = 10^x?

<p>y &gt; 0 (A)</p> Signup and view all the answers

If logₐx = 2 and logₐy = 3, what is the value of logₐ(xy)?

<p>logₐx + logₐy (D)</p> Signup and view all the answers

What is the range of the exponential function y = b^x?

<p>y &gt; 0 (C)</p> Signup and view all the answers

What is the horizontal asymptote of the exponential function y = b^x?

<p>y = 0 (A)</p> Signup and view all the answers

What is the intercept of the logarithmic function y = log_b x?

<p>(1, 0) (B)</p> Signup and view all the answers

What is the vertical asymptote of the logarithmic function y = log_b x?

<p>x = 0 (B)</p> Signup and view all the answers

Which of the following is true for the exponential function y = b^x when b > 1?

<p>The function is increasing. (C)</p> Signup and view all the answers

What is the property of the logarithmic function y = log_b x that states log_a 1 = 0?

<p>Zero property (C)</p> Signup and view all the answers

What is the property of the logarithmic function y = log_b x that states log_a a = 1?

<p>Identity property (C)</p> Signup and view all the answers

What is the domain of the logarithmic function y = log_b x?

<p>x &gt; 0 (C)</p> Signup and view all the answers

What is the value of logₐ(xⁿ) in terms of logₐx?

<p>n logₐx (D)</p> Signup and view all the answers

If a radioactive substance decays at a rate proportional to its current mass, which model best represents this decay?

<p>Exponential decay (D)</p> Signup and view all the answers

What is the value of logₐ(a) in terms of a?

<p>1 (C)</p> Signup and view all the answers

A city's population is currently 5000 and grows at a rate of 5% per year. How many years will it take for the population to reach 20000?

<p>25 years (C)</p> Signup and view all the answers

What is the value of logₐ(xy) in terms of logₐx and logₐy?

<p>logₐx + logₐy (D)</p> Signup and view all the answers

What is the value of logₐ(x/y) in terms of logₐx and logₐy?

<p>logₐx - logₐy (B)</p> Signup and view all the answers

What is the range of the function y = b^x when b > 1?

<p>All positive real numbers (A)</p> Signup and view all the answers

What is the relationship between the exponential function y = b^x and the logarithmic function y = log_b x?

<p>They are inverse functions (A)</p> Signup and view all the answers

If x = b^y, then what is the value of y?

<p>y = log_b x (C)</p> Signup and view all the answers

What is the shape of the graph of the exponential function y = b^x when 0 < b < 1?

<p>Decreasing (A)</p> Signup and view all the answers

If y = log_b x, then what is the equivalent exponential equation?

<p>b^y = x (C)</p> Signup and view all the answers

What is the asymptote of the graph of the exponential function y = b^x when b > 1?

<p>Horizontal asymptote at y = 0 (C)</p> Signup and view all the answers

If log_b x = 2 and log_b y = 3, what is the value of log_b (x/y)?

<p>-1 (C)</p> Signup and view all the answers

What is the intercept of the exponential function y = b^x when b > 1?

<p>(0, 1) (C)</p> Signup and view all the answers

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