 | John Ward (of Chester.) - Mathematics - 1724 - 480 pages
...&c. Or 3. 3. 3. 3. &c. If one of the Terms be mullipfa'd int» tke Number of Terms } the Prcduti wilt be the Sum of all the Terms in the Series. This is...no Example. LEMMA II. If the Series of Numbers in Arithmetic); frogreljion begin with it Cyflier, and, the common Difference be i. As oi 2. 3. 4. &c,... | |
 | Richard Frederick Clarke (the elder.) - 1833 - 158 pages
...terms. Ans. 1260 Sum of all terms. RULE — Add the extremes together, and multiply the sum by half the number of terms. The product will be the sum of all the terms. EXERCISES. 1. If the least term be 3, the greatest 108, and the number of terms 14, what is the sum... | |
 | Francis Walkinghame - 1859 - 200 pages
...second, and third terms given to find thefißh. RULE. Multiply the sum of the two extremes by half the number of terms ; the product will be the sum of all the terms. f, I, n, are given to find s. Thus,/,+/,xя,=s. 1. How many strokes does the hammer of a clock strike... | |
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RULE. Multiply the sum of the two extremes by half the number of terms, the product will be the sum of all the terms. 