In Exercises 89–102, determine whether each equation is true or false. Where possible, show work to support your conclusion. If the statement is false, make the necessary change(s) to produce a true statement. ln(x + 1) = ln x + ln 1
Ch. 4 - Exponential and Logarithmic Functions

5장, 문제 93
Evaluate or simplify each expression without using a calculator. eln 125
검증된 단계별 안내1
Recognize that the expression involves the natural exponential function and the natural logarithm: \(e^{\ln 125}\).
Recall the property of logarithms and exponentials that states \(e^{\ln x} = x\) for any positive \(x\).
Apply this property directly to simplify \(e^{\ln 125}\) to just \(125\).
Understand that this simplification works because the exponential function and the natural logarithm are inverse functions.
Therefore, the expression \(e^{\ln 125}\) simplifies to \(125\) without any further calculation.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
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주요 개념
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Properties of Logarithms and Exponents
Understanding how logarithms and exponents interact is essential. Specifically, the natural logarithm function ln(x) is the inverse of the exponential function e^x, meaning e^(ln a) = a for any positive number a.
추천 영상:
Change of Base Property
Natural Logarithm (ln)
The natural logarithm ln(x) is the logarithm to the base e, where e is approximately 2.718. It answers the question: to what power must e be raised to get x? This concept is fundamental when simplifying expressions involving e and ln.
추천 영상:
The Natural Log
Simplification Without a Calculator
Simplifying expressions like e^(ln 125) without a calculator relies on recognizing inverse functions and applying algebraic properties rather than numerical approximation, enabling exact answers in symbolic form.
추천 영상:
Change of Base Property
관련 실천
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x log 10x = x2
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