 | Jeremiah Day - Algebra - 1820 - 352 pages
...=2184. T~~~ I ' tj"- I Prob. 2. If the first term of a decreasing geometrical series is j, the ratio .y, and the number of terms 5 ; what is the sum of the series ? The last term=ar»-1=|x(|)4 = . J . . T2And the sum of the terms =- — j — r — =757;. .j —... | |
 | Jeremiah Day - Algebra - 1827 - 352 pages
....«iH4. r - 1 3— 1 Prob. 2. If the first term of a decreasing geometrical series is £, the ratio ij and the number of terms 5 ; what is the sum of the series ? The last term=ar"~' =1 X(i)4=Ti3> IX-1 i 121 And the sum of the terms =3J. — i'6a 3=:r^' Prob.... | |
 | Benjamin Greenleaf - Arithmetic - 1839 - 356 pages
...interest, when his son was 21 years old. Ans. $423.92.2-f-. 15. If the first term be 7, the ratio 4, and the number of terms 5, what is the sum of the series ? Ans. 9^. 16. If one mill had been put at interest at the commencement of the Christian era, what would it... | |
 | Benjamin Greenleaf - Arithmetic - 1841 - 334 pages
...interest, when his son was 21 years old. Ans. $423.92.2-)-. 15. If the first term be 7, the ratio i, and the number of terms 5, what is the sum of the series ? Ans. 9,8i. 16. If one mill had been put at interest at the commencement of the Christian era, what would... | |
 | James Bates Thomson - Algebra - 1844 - 266 pages
...^'=g= r— 1 3—1 Prob. 4. If the first term of a decreasing geometrical series is 'J', the ratio ^, and the number of terms 5, what is the sum of the series 1 '".'•" Prob. 5. What is the sum of the series, 1, 3, 9, 27, &c., to 12 terms'! > iC' f, •' 10... | |
 | James Bates Thomson - Algebra - 1844 - 272 pages
...=2184. r— 1 3—1 Prob. 4. If the first term of a decreasing geometrical series is •£, the ratio 3, and the number of terms 5, what is the sum of the series1 Prob. 5. What is the sum of the series, 1, 3, 9, 27, &c., to 12 terms1 Prob. 6. What is the... | |
 | James Robinson (of Boston.) - 1847 - 304 pages
...quotient will be the sum. of all the terms. 1. The extremes of an arithmetical series are 5 and 25, the number of terms 5 ; what is the sum of the series? 2. The extremes of an arithmetical series are 12 and 144, the number of terms 12 ; what is the sum... | |
 | Jeremiah Day, James Bates Thomson - Algebra - 1848 - 264 pages
...=2184. r— 1 3—1 Pro*. 4. If the first term of a decreasing geometrical series is ^, the ratio ^, and the number of terms 5, what is the sum of the series'! Prob. 5. What is the sum of the series, 1, 3, 9", 27, fee., to 12 terms1 Prob. 6. What is the sum of... | |
 | Benjamin Greenleaf - Arithmetic - 1850 - 368 pages
...to have doubled itself every 12 years, January 1, 1837 ? 17. If the first term be 7, the ratio £, and the number of terms 5, what is the sum of the series ? Ans.-9 2 8 T 3 ^. Ans. $ 11417981541647679048466287755595961091061972.99,2. If this sum was all in... | |
 | Benjamin Greenleaf - 1851 - 332 pages
...number of terms 7, required the sum of the series. Ans. 43688. 4. If the first term is 10, the ratio f , and the number of terms 5, what is the sum of the series ? Ans. 30T6^. 5. If the first term is 18, the ratio 1.06, and the number of terms 4, what is the sum of the... | |
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If the first term is 18, the ratio 1.06, and the number of terms 4, what is the sum of the series ? Ans. 
