Concept Check. If ƒ(x) = ax and ƒ(3) = 27, determine each function value. ƒ(2)
Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
6. Exponential & Logarithmic Functions
Introduction to Exponential Functions
Problem 1
Textbook Question
In Exercises 1–10, approximate each number using a calculator. Round your answer to three decimal places. 23.4
Verified step by step guidance1
Identify the expression to evaluate: \$2^{3.4}$.
Recall that \(a^b\) means \(a\) raised to the power of \(b\), where \(a=2\) and \(b=3.4\) in this case.
Use a calculator to compute \$2^{3.4}\(. Most calculators have a power function, often labeled as \)x^y\( or \)\hat{}$.
Enter 2, then use the power function, and then enter 3.4 to get the approximate value.
Round the result to three decimal places as instructed.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
45sPlay a video:
Was this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Exponents and Powers
Exponents indicate how many times a base number is multiplied by itself. For example, 2^3 means 2 multiplied by itself 3 times (2 × 2 × 2). Understanding how to interpret and work with exponents is essential for evaluating expressions like 2^3.4.
Recommended video:
Powers of i
Decimal Exponents
Decimal exponents represent roots and fractional powers, extending the idea of integer exponents. For instance, 2^3.4 means 2 raised to a power between 3 and 4, which can be calculated using logarithms or a calculator. This concept helps in approximating values that are not whole-number powers.
Recommended video:
Guided course
Rational Exponents
Rounding to a Specified Decimal Place
Rounding is the process of limiting a number to a certain number of decimal places for simplicity and clarity. Rounding to three decimal places means keeping three digits after the decimal point and adjusting the last digit based on the next digit. This ensures the answer is precise yet manageable.
Recommended video:
The Number e
Watch next
Master Exponential Functions with a bite sized video explanation from Patrick
Start learningRelated Videos
Related Practice
Textbook Question
30
views
