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Ch. 4 - Exponential and Logarithmic Functions
Blitzer - College Algebra 8th Edition
Blitzer8th EditionCollege AlgebraISBN: 9780136970514당신이 사용하는 게 아니라요?교과서 변경
5장, 문제 97

Evaluate or simplify each expression without using a calculator. eln5x2e^{\(\ln\)5x^2}

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Recognize that the expression is \(e^{(\ln 5x^2)}\), which involves the exponential function and the natural logarithm function.
Recall the property of logarithms and exponentials: \(e^{\ln a} = a\) for any positive \(a\).
Apply this property to simplify \(e^{(\ln 5x^2)}\) directly to \$5x^2$.
Note that this simplification holds as long as the argument inside the logarithm, \$5x^2$, is positive, which means \(x \neq 0\).
Therefore, the simplified form of the expression is \$5x^2$.

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주요 개념

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Properties of Exponents

Understanding how to manipulate expressions with exponents is essential. For example, the rule e^(a + b) = e^a * e^b allows breaking down complex exponentials, and e^(ln x) simplifies directly to x when x is positive.
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Rational Exponents

Natural Logarithm (ln) and Its Inverse Relationship with Exponentials

The natural logarithm ln(x) is the inverse function of the exponential function e^x. This means e^(ln y) = y for y > 0, which helps simplify expressions like e^(ln 5x^2) directly to 5x^2.
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Solving Logarithmic Equations

Simplifying Algebraic Expressions

After applying logarithmic and exponential properties, simplifying the resulting algebraic expression is necessary. This includes understanding how to handle powers, coefficients, and variables, such as recognizing that (x^2) remains as is unless further simplification is possible.
추천 영상:
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Simplifying Algebraic Expressions