 | Mathematics - 1801 - 446 pages
...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
...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... | |
 | Arithmetic - 1811 - 210 pages
...,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... | |
 | Zachariah Jess - Arithmetic - 1813 - 228 pages
...the first term, the sum is the last term. Secondly, Multiply the sum of the two extremes by thenumber of terms, and half the product will be the sum of the •fries. EXAMPL « 8. .EXAMPLES. t Bought 19 yards of shalloon, at id. for the first yard, 3</. for... | |
 | Arithmetic - 1817 - 214 pages
...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 product will be the sum of all the terms. EXAMPLES. 1 . The first term of a certain series in arithmetical pro gression is 2,... | |
 | Nathan Daboll - Arithmetic - 1817 - 252 pages
...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
...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
...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... | |
 | Leonhard Euler - Algebra - 1821 - 380 pages
...therefore will be = ° *'. 376. This result furnishes an easy method of finding the sum of any arithmetical progression ; and may be reduced to the following...term by the number of terms, and half the product wul be the sum of the whole progression. Or, which amounts to the same, multiply the sum of the first... | |
 | Jacob Willetts - Arithmetic - 1822 - 200 pages
...product add the first term ; the sum is the last terns. Secondly, 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. Bought 19 yards of shalloon, at Id. for the first vard, 3d. for the second.... | |
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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. 
