Logarithms
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Questions and Answers

What is the condition on 'a' for y = loga x to be defined?

  • Any positive real number ≠ 1 (correct)
  • Any number
  • Any positive real number
  • Any positive real number > 1

What is the value of x in the equation 2^(2x) = 32^(5/4)?

  • 3.6 (correct)
  • 5.6
  • None of these
  • 4.5

Which of the following properties of logarithms is true?

  • loga b = logb a
  • loga b.logb a = 1 (correct)
  • loga b.logc a = logc b
  • loga b.logb c = loga c

What is the value of loga (mn) if m and n are arbitrary positive numbers?

<p>loga m + loga n (B)</p> Signup and view all the answers

What can be said about the number log2 7?

<p>It is an irrational number (B)</p> Signup and view all the answers

What is the logarithm of a given number to a given base?

<p>The index of the power to which the base must be raised in order to equal the given number (C)</p> Signup and view all the answers

What is the range of the logarithmic function f(x) = loga x, a > 0, a ≠ 1?

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

What is the logarithmic identity that states a^(loga N) = N?

<p>Fundamental logarithmic identity (D)</p> Signup and view all the answers

If the characteristic of log10 N is -n, then how many zeros are there after the decimal part of N?

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

What is the logarithmic function called when the base is e?

<p>Napierian logarithmic function (A)</p> Signup and view all the answers

If log₇(2) = m, then log₄₉(28) is equal to?

<p>2(1 + 2m) (D)</p> Signup and view all the answers

If logₑ(a + b) = logₑ(a) + logₑ(b), then what is the relation between a and b?

<p>a + b = ab (B)</p> Signup and view all the answers

If log₁₀(3) = 0.477, then the number of digits in 3⁴⁰ is?

<p>20 (C)</p> Signup and view all the answers

What is the correct order of the logarithms in increasing order for a given number α?

<p>log₁₀(α), logₑ(α), log₂(α), log₃(α) (B)</p> Signup and view all the answers

If y = 3⁴⁰, then what is the value of log(y)?

<p>19.08 (C)</p> Signup and view all the answers

If logₐ(m) = logₐ(n) and a ≠ 1, then what can be concluded about m and n?

<p>m = n (A)</p> Signup and view all the answers

If logₐ(x) = p and logₐ(y) = q, then what is the value of logₐ(xy)?

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

Solve for x in the equation log₂(x) = 3/2.

<p>√(2³) (A)</p> Signup and view all the answers

If logₐ(b) = c and logₑ(d) = 1/c, then what is the value of logₑ(b)?

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

If a^(logₐ(m)) = m, then what is the value of m^(logₘ(a))?

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

What is the value of loga N if a^x = N and a^y = 1/N?

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

If the logarithm of a number is 2.5, then what is the value of the number?

<p>10^2.5 (C)</p> Signup and view all the answers

What is the value of loga MN if loga M = x and loga N = y?

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

If loga N = 2, then what is the value of log(a^2) N?

<p>4 (C)</p> Signup and view all the answers

What is the value of loga (1/N) if loga N = x?

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

If logₑ(x) + logₑ(y) = logₑ(z), then what is the relationship between x, y, and z?

<p>xy = z (A)</p> Signup and view all the answers

Solve for x in the equation log₂(x) = 2log₂(3) + log₂(4)

<p>12 (A)</p> Signup and view all the answers

If loga(x) = loga(y) + loga(z), then what is the relationship between x, y, and z?

<p>x = yz (A)</p> Signup and view all the answers

If loga(x) = 2loga(y), then what is the relationship between x and y?

<p>x = y^2 (C)</p> Signup and view all the answers

If log₂(x) = log₄(y), then what is the relationship between x and y?

<p>x = y^(1/4) (A)</p> Signup and view all the answers

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