 | 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... | |
 | 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
...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...The first term of a certain series in arithmetical pro gression is 2, the common difference is 2, and the number of terms 15 ; what is the last term,... | |
 | 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... | |
 | 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... | |
 | 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... | |
 | Jacob Willetts - Arithmetic - 1822 - 200 pages
...the common .difference, and to the product add the first term ; the sum is the last terns. Secondly, Multiply the sum of the two extremes by the number...product will be the sum of all the terms, EXAMPLES. 1. Bought 19 yards of shalloon, at Id. for the first vard, 3d. for the second. 5d. for the third, &c.... | |
 | Stephen Pike - Arithmetic - 1824 - 212 pages
...less 1, by the common 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...certain series in arithmetical progression is 2, the common difference is 2, and the number of terms 1 5 ; what is the last term, and the sum | of all the... | |
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Multiply the sum of the two extremes by the number of terms, and half the product will be the sum of all the terms. 
