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 35

Evaluate each expression without using a calculator. log5 5

검증된 단계별 안내
1
Recall the definition of a logarithm: \(\log_b a = c\) means that \(b^c = a\).
In this problem, we have \(\log_5 5\), which asks: "To what power must 5 be raised to get 5?"
Since \(5^1 = 5\), the exponent that satisfies this equation is 1.
Therefore, \(\log_5 5 = 1\) because the base and the argument are the same.
This is a general property of logarithms: \(\log_b b = 1\) for any positive base \(b \neq 1\).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
44s
도움이 되었나요?

주요 개념

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

Definition of Logarithms

A logarithm answers the question: to what exponent must the base be raised to produce a given number? For example, log_b(a) = c means b^c = a. Understanding this definition is essential to evaluate logarithmic expressions.
추천 영상:
7:30
Logarithms Introduction

Logarithm of a Base to Itself

The logarithm of a base raised to itself, such as log_b(b), always equals 1 because the base raised to the power 1 equals itself. This property simplifies expressions like log5 5 directly to 1.
추천 영상:
7:30
Logarithms Introduction

Properties of Logarithms

Logarithms follow specific properties, such as log_b(b^x) = x and log_b(1) = 0. Recognizing these properties helps in simplifying and evaluating logarithmic expressions without a calculator.
추천 영상:
5:36
Change of Base Property
관련 실천
교과서 질문

Use properties of logarithms to expand each logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator. log5x2y243\(\log\)_5 \(\sqrt\)[3]{\(\frac{x^2 y}{24}\)}

892
views
교과서 질문

Use properties of logarithms to expand each logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator. ln(x3x2+1(x+1)4)\(\ln\) \(\left\)( \(\frac{x^3 \sqrt{x^2 + 1}\)}{(x + 1)^4} \(\right\))

981
views
교과서 질문

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(5x−3) - 2 =10,476

934
views
교과서 질문

Evaluate each expression without using a calculator. log4 1

862
views
교과서 질문

The figure shows the graph of f(x) = ex. In Exercises 35-46, use transformations of this graph to graph each function. Be sure to give equations of the asymptotes. Use the graphs to determine graphs. each function's domain and range. If applicable, use a graphing utility to confirm your hand-drawn g(x) = ex-1

781
views
교과서 질문

In Exercises 36–38, begin by graphing f(x) = log2 x Then use transformations of this graph to graph the given function. What is the graph's x-intercept? What is the vertical asymptote? Use the graphs to determine each function's domain and range. g(x) = log2 (x-2)

1325
views