Ch. 1 - Equations and Inequalities

Blitzer8th EditionCollege AlgebraISBN: 9780136970514Non è quello che usi tu?Cambia libro di testo

Blitzer 8th Edition

Ch. 1 - Equations and Inequalities

Problema 54

Capitolo 2, Problema 54

Solve each formula for the specified variable. Do you recognize the formula? If so, what does it describe? 1/R = 1/R₁ + 1/R₂ for R₁

Guida verificata passo dopo passo

Start with the given formula:

\frac{1}{R} = \frac{1}{R_{1}} + \frac{1}{R_{2}}

. The goal is to solve for

R_{1}

Subtract

\frac{1}{R_{2}}

from both sides of the equation to isolate the term involving

R_{1}

\frac{1}{R} - \frac{1}{R_{2}} = \frac{1}{R_{1}}

Simplify the left-hand side by finding a common denominator if necessary. This will combine the fractions into a single term:

\frac{expression}{denominator}

\frac{1}{R_{1}}

Take the reciprocal of both sides to solve for

R_{1}

. This step involves flipping the numerator and denominator on both sides of the equation.

Simplify the resulting expression to express

R_{1}

explicitly in terms of

R

and

R_{2}

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Algebraic Manipulation

Algebraic manipulation involves rearranging equations to isolate a specific variable. This process includes operations such as adding, subtracting, multiplying, or dividing both sides of the equation by the same value. In this case, solving for R1 requires moving terms around to express R1 in terms of R and R2.

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Introduction to Algebraic Expressions

Reciprocal Relationships

The formula 1/R = 1/R1 + 1/R2 describes the relationship between resistances in a parallel circuit, where the total resistance (R) is the reciprocal of the sum of the reciprocals of individual resistances (R1 and R2). Understanding reciprocals is crucial, as it helps in visualizing how combining resistances affects the overall circuit behavior.

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Circuit Theory

Circuit theory is the study of how electrical components interact within a circuit. The formula provided is a fundamental concept in electrical engineering, specifically for parallel circuits, where the total resistance is less than the smallest individual resistance. Recognizing this formula helps in understanding how electrical systems function and how to calculate total resistance effectively.

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