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" I 2,4,6,8, &c. is an ascending arithmetical series : o ( 8,6,4,2, &c. is a descending arithmetical series : The numbers which form the series, are called the terms of the progression ; the first and last terms of which aro called the extremes.* PROBLEM... "
Daboll's Schoolmaster's Assistant: Improved and Enlarged, Being a Plain ... - Σελίδα 178
των Nathan Daboll - 1831 - 240 σελίδες
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The Improved Arithmetic: Newly Arranged and Clearly Illustrated, Both ...

Daniel Parker - 1828 - 348 σελίδες
...difference 5. The sum of all the terms. Any three of the foregoing being given, the other two may be found. PROBLEM I. The first term, the last term, and the number of terms being given, to find the stun of all the terms. RULE. Multiply the sum of the extremes by the...

Daboll's Schoolmaster's Assistant: Improved and Enl. ...

Nathan Daboll - 1829 - 240 σελίδες
...form the series, are callei' the tenr^s of the progression ; the first and last terms of which tu"i called the extremes.* PROBLEM I. The first term, the last term, and the number of tenni being given, to find the sum of nil the terms. * A scries in progression include" five po-ts,...

A Short System of Practical Arithmetic: Compiled from the Best Authorities ...

William Kinne - 1829
...the numbers increase, they form an ascending series; but when they decrease, they form a descending series The numbers which form the series, are called the terms of the progression. Any three of the five following terms being given, the other two may readily be found. ad'.' Se fastS...

Daboll's Schoolmaster's Assistant: Improved and Enlarged: Being a Plain ...

Nathan Daboll - 1829 - 240 σελίδες
...in Arithmetical Progression. o S 2, 4, 6, S, &c. is an ascending arithmetical series : (8,6, 4> 2, &c. is a descending arithmetical series: The numbers which form the series, are cilled the terms of the progression ; the first and last terms of which are called the extremes." PROBLEM...

Practical and Mental Arithmetic on a New Plan: In which Mental ..., Βιβλίο 2

Roswell Chamberlain Smith - 1829 - 268 σελίδες
...descending arithmetical aeries, because it ù formed by a continual subtraction of the common difference, 2. The numbers which form the series are called the terms of the series or pro• greasion. The first and last terms are called the extremes^ and the other terms the...

Adams's New Arithmetic: Arithmetic, in which the Principles of Operating by ...

Daniel Adams - 1830 - 264 σελίδες
...of the common difference, they form a descending series. 3, 5, 7, 9, 11, 13, 15, &c. is an ascending series. The numbers which form the series are called the terms of the series. The first and last terms are the extremes, and the other terms are called the means. There...

Arithmetic: In which the Principles of Operating by Numbers are Analytically ...

Daniel Adams - 1830 - 264 σελίδες
...5, 7, 9, 11, 13, 15, &c. is an ascending serie*. Anus, £ 15i 13, lti 9, 7, 5, 3) &c ;sa descending series. The numbers which form the series are called the terms of the series. The fast and last terms are the extremes, and the other terms are called the means. There are...

A New System of Arithmetick: In which the Rules are Familiarly Demonstrated ...

William Ruger - 1832 - 263 σελίδες
...rp, C 2, 4, 6, 8, 10, 12, &c. is an ascending series. nus, £ 12, 10, 8, g, 4, 2, &c ls a desccn(jing series. The numbers which form the series are called the TERMS of tlirprogression. The FIRST and LAST terms are the EXTREMES, aad the other terms are called the MEANS....

The Common School Arithmetic: Prepared for the Use of Academies and Common ...

Charles Davies - 1833 - 270 σελίδες
...20, 23, is an ascending series. 23,20,17,14,11, 8, 5, 2. is a descending aeries. The several numbers are called the terms of the progression : the first and last terms are called the •extremes, and the intermediate terms are called the means. $ 224- In every arithmetical...

The North American Arithmetic: for advanced scholars. Part third

Frederick Emerson - 1834 - 288 σελίδες
...increase by 1 ; but 9, 8, 7, 6, &c. form a descending series, because they continually decrease by 1. The numbers, which form the series, are called the terms of the series. The first and last terms in the series are called the extremes; and the other terms, the means....




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