 | Mathematics - 1801 - 446 pages
...and the number of terms behtg 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. EXAMPLES. * Suppose another series of the same kind with the given one be placed under it in... | |
 | Jeremiah Paul - Arithmetic - 1801 - 238 pages
...term, gives the last term. Then, multiply the sum of the extremes by the number ef terms, ana half-the product will be the sum of all the terms. EXAMPLES. 1. Bought 30 yards of broadcloth, at l:s. for the first yard, 3s. for the second, 5s. tor the third &c. increasing... | |
 | Nicolas Pike - Arithmetic - 1809 - 312 pages
...and the number of terms being gi-oent to fnd the fum of all ths terms, RULE. Multiply the fum of the extremes by the number of terms, and half the product will be the anfwer. EXAMPLES. i. The extremes of an arithmetical feries are 3 and 39, and the number of terms i... | |
 | Zachariah Jess - Arithmetic - 1810 - 222 pages
....', by the common difference, and to „that produit 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 produit will be the sum of the series, EXAMPLES. i -Bought 19 yards of shalloon, at \d. for the first... | |
 | Arithmetic - 1811 - 210 pages
...less 1, by the common difference, and ,to the product add the first teim, 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 qf all the terms. f EXAMPLES. •I. The first term 01 a certain series in anumicucoi progression is... | |
 | Arithmetic - 1817 - 214 pages
...difference, and to the product add the first term, the sum is the last term. > 2. Multiply the sum ef the two extremes by the number of terms, and half...product will be the sum of all the terms. EXAMPLES. 1 . The first term of a certain series in arithmetical pro gression is 2, the common difference is 2,... | |
 | Nathan Daboll - Arithmetic - 1817 - 252 pages
...are best understood by an algebraic process, md are here omitted. :, RULE. Multiply the sum of the extremes by the number of terms, and half the product will be the answer. EXAMPLES. 1. The first term of an arithmetical series is 3, the last term 23, and the number... | |
 | Nathan Daboll - Arithmetic - 1818 - 246 pages
...them are best understood by an algebraic process, nnd are here omitted. RULE. Multiply the sum of the extremes by the number of terms, and half the product will be the answer.' EXAMPLES. ^ . 1. The first term of an arithmetical series is 3, the last term 23, and the... | |
 | Arithmetic - 1818 - 264 pages
...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. EXAMPLES. 1. The first term of an arithmetical progression is 5, the last term, 60, and the... | |
 | Etienne Bézout - Mathematics - 1824 - 238 pages
...by the common difference ; 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...product will be the sum of all the terms. EXAMPLES. 1. The first term of a certain series in arithmetical progression is 2, the ratio between the terms is... | |
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The first term, common difference, and number of terms given, to find the .last term, and sum of all the terms. 
