Skip to main content
Ch. 4 - Exponential and Logarithmic Functions
Blitzer - College Algebra 8th Edition
Blitzer8th EditionCollege AlgebraISBN: 9780136970514당신이 사용하는 게 아니라요?교과서 변경
5장, 문제 33

Solve each exponential equation in Exercises 23–48. Express the solution set in terms of natural logarithms or common logarithms. Then use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. e(1−5x)=793

검증된 단계별 안내
1
Start with the given exponential equation: \(e^{(1 - 5x)} = 793\).
To solve for \(x\), take the natural logarithm (ln) of both sides to utilize the property that \(\ln(e^y) = y\). This gives: \(\ln\left(e^{(1 - 5x)}\right) = \ln(793)\).
Simplify the left side using the logarithm property: \(1 - 5x = \ln(793)\).
Isolate the term containing \(x\) by subtracting 1 from both sides: \(-5x = \ln(793) - 1\).
Finally, solve for \(x\) by dividing both sides by \(-5\): \(x = \frac{1 - \ln(793)}{5}\).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
3m
도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Exponential Equations

An exponential equation involves variables in the exponent, such as e^(1−5x) = 793. Solving these requires isolating the exponential expression and then applying logarithms to both sides to solve for the variable.
추천 영상:
5:47
Solving Exponential Equations Using Logs

Natural Logarithms

The natural logarithm (ln) is the inverse function of the exponential function with base e. Applying ln to both sides of an equation like e^(1−5x) = 793 allows you to simplify the exponent and solve for x.
추천 영상:
2:51
The Natural Log

Using a Calculator for Approximations

After expressing the solution in logarithmic form, a calculator is used to find decimal approximations. This step involves evaluating logarithms and performing arithmetic to get a numerical answer rounded to the desired decimal places.
추천 영상:
5:47
Solving Exponential Equations Using Logs