Logarithm Problem Set 1
This Logarithm Problem Set 1 assesses understanding of logarithmic functions and equations. It includes solving logarithms with various bases and converting logarithmic expressions to exponential forms, essential for students mastering algebra.
Questions and Answers
- 1.
Evaluate: log416
Explanation
The given expression is asking for the logarithm of 416 base 2. To evaluate this, we need to find the exponent to which 2 must be raised to get 416. Since 2^8 = 256 and 2^9 = 512, we know that 416 is between these two powers of 2. Therefore, the answer is 8.Rate this question:
- 2.
Evaluate:log6(1/36)
Explanation
The given expression is evaluating the logarithm of 1/36 to the base 6. The logarithm of a number is the exponent to which the base must be raised to obtain that number. In this case, we need to find the exponent that 6 must be raised to in order to get 1/36. Since 6 raised to the power of -2 equals 1/36, the answer is -2.Rate this question:
- 3.
Evaluate:Enter answer as an improper fraction or a decimal
Explanation
The given question asks to evaluate the expression 3/2. The answer is both 3/2 and 1.5 because they represent the same value. 3/2 is an improper fraction, where the numerator (3) is greater than the denominator (2). On the other hand, 1.5 is a decimal representation of the same value. Both answers are correct and equivalent.Rate this question:
- 4.
Solve for x:logx64=2
Explanation
The equation logx64=2 can be rewritten as x^2=64. Taking the square root of both sides, we find that x=±8. However, since the logarithm function is only defined for positive values of x, the only valid solution is x=8.Rate this question:
- 5.
Solve for x:log3x=-2Enter answer as a fraction or as a decimal to the thousandths place.
Explanation
The correct answer is 1/9, 0.111, .111.
To solve the equation log3x = -2, we need to rewrite it in exponential form. Since the base of the logarithm is 3, we can rewrite it as 3^-2 = x. Simplifying this, we get x = 1/9. Therefore, the answer is 1/9.
Additionally, 1/9 can be expressed as a decimal, which is 0.111 when rounded to the thousandths place. Hence, both 0.111 and .111 are also correct answers.Rate this question:
- 6.
Log(1/2)8=x
Explanation
The equation log base 1/2 of 8 equals x can be rewritten as 1/2 raised to the power of x equals 8. To find the value of x, we need to determine what exponent, when 1/2 is raised to that power, gives us 8. In this case, x equals -3 because 1/2 raised to the power of -3 is equal to 8.Rate this question:
- 7.
Solve for x:log4x=3
Explanation
To solve the equation log4x = 3, we need to rewrite it in exponential form. Since the base of the logarithm is 4, we can rewrite it as 4^3 = x. Simplifying this equation gives us x = 64. Therefore, the value of x that satisfies the equation is 64.Rate this question:
- 8.
Which of the following is the correct inverse of the function f(x) = 4x ?A. f-1(x) = x4 B. f-1(x) = x 1/4 C. f-1(x) = log4xD. f-1(x) = log(1/4)xE. This function has no inverse.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
C. CExplanation
The correct inverse of the function f(x) = 4x is f-1(x) = log4x. The inverse function undoes the original function, so when we apply the inverse function to the output of the original function, we should get back the input. In this case, if we apply f-1(x) = log4x to the output of f(x) = 4x, we get log4(4x) = x. Therefore, C is the correct answer.Rate this question:
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- 9.
Which of the following is the inverse of the function f(x) = log(1/2)x?A. f-1(x) = 2xB. f-1(x) = (1/2)xC. f-1(x) = x2D. f-1(x) = x(1/2)E. That function has no inverse.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
B. BExplanation
The correct answer is B because to find the inverse of a function, we switch the x and y variables and solve for y. In this case, we have f(x) = log(1/2)x. To find the inverse, we switch x and y to get x = log(1/2)y. Then, we solve for y by exponentiating both sides with base 2, which gives us 2^x = y. Therefore, the inverse function is f-1(x) = (1/2)x.Rate this question:
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- 10.
What is 5log5x equivalent to?
Correct Answer
xExplanation
The expression 5log5x can be simplified using the logarithmic property, which states that log_b(b^a) = a. In this case, the base of the logarithm is 5 and the exponent is x. Since the base and the logarithm are the same, the expression simplifies to x.Rate this question:
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Mar 20, 2023Quiz Edited by
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May 11, 2010Quiz Created by
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