# Textbook Notes for MATH 123 at McGill University

MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 2: Augmented Matrix, Identity Matrix

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Chapter 2: systems of linear equations and matrices. Solution of linear systems by the echelon method. Solution of linear systems by the gauss-jordan m
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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 4: Slack Variable, Negative Number

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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 7: Sample Space, Conditional Probability, Empirical Probability

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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 1: Fixed Cost, Marginal Cost

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Linear functions have graphs which are straight lines. The slope of a line is defined as the vertical change (cid:894)the (cid:862)rise(cid:863)(cid:89
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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 9: Standard Deviation, Central Tendency, Binomial Distribution

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Measures of central tendency: mean, median, mode. The mean of numbers can be given by: The mean of a grouped distribution can be given by: We can deter
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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 3: Feasible Region

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Linear programming attempts to solve maximization and minimization problems with linear constraints. Linear programming models can be used to analyze a
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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 5: Compound Interest, Interest, Sinking Fund

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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 18: Cumulative Distribution Function, Standard Deviation, Random Variable

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Calculus is used in the study of probability. We focus on the idea of a random variable and its connection to a probability density function and a cumu
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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 8: Binomial Distribution, Random Variable, Histogram

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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter 15: Antiderivative, Power Rule, Numerical Integration

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The first main idea of integration is indefinite integration, or finding an antiderivative. Substitution: the quantity under a root or raised to a powe
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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter 12: MATH 123 - Chapter 12

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MCGILLMATH 123Sidney TrudeauWinter

## MATH 123 Chapter Notes - Chapter R: Greatest Common Divisor, Irreducible Polynomial, Distributive Property

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Terms having the same variable and the same exponent are like terms. Terms that do not have both the same variable and the same exponent are unlike ter
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