 | Phinehas Merrill - Arithmetic - 1819 - 116 pages
...term, and the number of terme being given, to find the aggregate, or total вит of alt the terns. RULE —Multiply the sum of the extremes by the number...and half the product will be the answer. EXAMPLES. •. > i •« 1. The first term is 2, the last term 55, and the number of terms 18, required the sun.... | |
 | Nicolas Pike - Arithmetic - 1822 - 562 pages
...The first term, the last term, and the number of terms being given, to find the sum of all the terms. RULE.! Multiply the sum of the extremes by the number...of terms, and half the product will be the answer. * The difference of the first and last terms evidently shews the increase of tJie first term by all... | |
 | Nicolas Pike - Arithmetic - 1822 - 536 pages
...term, the last term, and the number of terms being given, to find the sum of all the terms. • RuLE.t Multiply the sum of the extremes by the number of terms, and half the product will be the answer. * The difference of the first and last terms evidently shews the increase of the first term by all... | |
 | Zachariah Jess - Arithmetic - 1824 - 224 pages
...to that product add the first term, the sum is the last term. Secondly, Multiply the sum of the two extremes by the, number of terms, and half the product will be the sum of the series. EXAMPLES. EXAMPLES. 1 Bought 19 yards of shalloon, at Id. for the first yard, 3d.... | |
 | Etienne Bézout - Mathematics - 1824 - 238 pages
...to the product add the first term, and their sum will be the last term. Multiply the sum of the two extremes by the number of terms, and half the product will be the sum of all the terms. EXAMPLES. 1. The first term of a certain series in arithmetical progression is... | |
 | Stephen Pike - Arithmetic - 1824 - 212 pages
...difference, and to the product add the first term, the sum is the last term. 2. Multiply the sum of the two extremes by the number of terms, and half the product will be the sum of all the terms. EXAMPLES. 1. The first term of a certain series in arithmetical progression is... | |
 | Nathan Daboll - Arithmetic - 1825 - 248 pages
...of them are best undei'stood bií an ttiifc•'raic ptvcess. an^ are hers AШTИМК-'ПСAТ. KULE. Multiply the sum of the extremes by the number of...product will be the answer. EXAMPLES. 1. The first term oí an arithmetical series is 3,the last term 23, aml the number of terms 1 1 ; required the sum of... | |
 | Silvestre François Lacroix - Arithmetic - 1825 - 394 pages
...progression ; and may be reduced to the following rule : Multiply the sum of the first and the last term by the number of terms, and half the product will be the sum of the wJutle progression. Or, which amounts to the same, multiply the sum of tlie first and the... | |
 | Thomas Tucker Smiley - Arithmetic - 1825 - 224 pages
...first term' the sum is the last term. 2. Add the first and last terms together, and multiply the sum by the number of terms, and half the product will be the sum of all the terms. Case 2. When the first and last terms (or two extremes,) are given to find the... | |
 | Zadock Thompson - Arithmetic - 1826 - 176 pages
...I. The first term, the last term, and the number of terms given, to find the sum of all the terms. RULE.* — Multiply the sum of the extremes by the...answer. Examples. 1. The first term of an arithmetical progression is 1, the last term 21, and the number of Iprms 1 1 ; what is the sum of the series? 2]... | |
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RULE.* — Multiply the sum of the extremes by the number of terms, and half the product will be the answer. 
