 ... terms. Hence, The sum of an arithmetical series may be found by multiplying one-half the sum of the first and last terms by the number of terms. Thus, the sum of eight terms of the series whose first term is 3, and last term 38, is EXERCISE LXXXVII....  A Practical Arithmetic - Page 308by George Albert Wentworth, Thomas Hill - 1882 - 351 pagesFull view - About this book
 | George Albert Wentworth - Arithmetic - 1898 - 424 pages
...last terms. Hence, 616. To Find the Sum of the Terms of an Arithmetical Progression, Multiply one half the sum of the first and last terms by the number...the series whose first term is 3 and last term 38 is 8 X i (3 + 38) = 164. EXERCISE 147. 1. Find the sum of 1, 5, 9, etc., to twenty terms. 2. Find the... | |
 | George Albert Wentworth - Arithmetic - 1898 - 424 pages
...last terms. Hence, 616. To Find the Sum of the Terms of an Arithmetical Progression, Multiply one half the sum of the first and last terms by the number...the series whose first term is 3 and last term 38 is 8 X \ (3 + 38) = 104. EXERCISE 147. 1. Find the sum of 1, 5, 9, etc., to twenty terms. 2. Find the... | |
 | Edward Bathurst Fackler - Insurance, Life - 1907 - 216 pages
...arithmetical series multiplied by — , and the rule for finding the sum of such a series is: — "Multiply the sum of the first and last terms by the number of terms and divide the product by two." Here the first term (within brackets) and the last is ax. The number... | |
 | Edward Bathurst Fackler - Life insurance - 1920 - 216 pages
...arithmetical series multiplied by — , and the rule for finding the sum of such a series is : — " Multiply the sum of the first and last terms by the number of terms and divide the product by two." Here the first term (within brackets) is I + ax\ and the last is ox.... | |
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