# A Drill-book in Algebra

George W. Jones, 1892 - Algebra - 272 pages

### Contents

 SECTION 1 Multiplication and division 11 Positive and negative numbers 19 Addition and subtraction 25 Involution and evolution 33 Addition and subtraction 41 Fractions 54 Questions for review 68
 Proportion 143 Inequalities 149 Questions for review 160 2 167 5 181 6 187 QUADRATIC EQUATIONS 198 Two unknown elements 208

 One unknown element 75 Two unknown elements 87 Integers 106 Entire functions of one letter 117 Entire factors 125 The lowest common multiple 133 INCOMMENSURABLE NUMBERS 136
 Questions for review 214 Arithmetic progression 221 Harmonic progression 227 Logarithms 244 Questions for review 247 Permutations 250 Questions for review 267

### Popular passages

Page 54 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.
Page 246 - IV. PERMUTATIONS AND COMBINATIONS. § 1. DEFINITIONS. THE different orders in which several things or elements can be put, are their permutations or arrangements; the different groups that can be made of them, without regard to order, are their combinations. Two permutations are different when either the things themselves are different or their order of arrangement is different ; but two combinations are different only when at least one of the things contained in one of them is not found in the other....
Page 144 - In a series of equal ratios, any antecedent is to its consequent, as the sum of all the antecedents is to the sum of all the consequents. Let a: 6 = c: d = e :/. Then, by Art.
Page 73 - A shepherd being asked how many sheep he had in his flock, said, if I had as many more, half as many more, and 7 sheep and a half, I should have just 500; how many had he?
Page 81 - Divide the number 90 into 4 such parts, that the . first increased by 2, the second diminished by 2, the third multiplied by 2, and the fourth divided by 2, shall all be equal.
Page 232 - The logarithm of a product is the sum of the logarithms of the factors. 10™ 2. —— =10™~r. The logarithm of a quotient is the logarithm of the dividend minus the logarithm of the divisor. 3. (10"')r = 10"'.
Page 144 - In any proportion the terms are in proportion by Composition and Division; that is, the sum of the first two terms is to their difference, as the sum of the last two terms is to their difference.
Page 81 - B engage in play ; in the first game A wins as much as he had and four shillings more, and finds he has twice as much as B ; in the second game B wins half as much as he had at first and one shilling more, and then it appears he has three times as much as A : what sum had each at first...
Page 89 - C are three towns forming a triangle. A man has to walk from one to the next, ride thence to the next, and drive thence to his starting point. He can walk, ride, and drive a mile in a, b, c minutes respectively.
Page xii - How much will it cost to plaster the walls and ceiling of a room 16 ft. 3' long, 14 ft. 2