 | Charles Davies - Algebra - 1860 - 330 pages
...the number of terms 80: what is the sum of the series ? Ans. 12000. 5. The extremes are 500 and 60, and the number of terms 20 : what is the sum of the series ? Ans. 5600. 6. The extremes are 800 and 1200, and the number of terms 50 : what is the sum of the... | |
 | Benjamin Greenleaf - 1863 - 338 pages
...the sum of the extremes. EXAMPLES. 1. Find the sum of an arithmetical series, of which the first term is 3, the common difference 2, and the number of terms 20. Ans. 440. 2. If the first term is 7, the common difference — 4, and the number of terms 6, what is... | |
 | Jeremiah Day - 1866 - 434 pages
...a— — > the common difference. n3 — n * 4. n— — 5 —3 > the number of terriji .i(L Ex. 1 . If the first term of an increasing arithmetical series...difference 2, and the number of terms 20 ; what is the s'"~ ^f the series ? Ans. 440. 2. If 100 si- oe placed in a straight line, at the distance of a yard... | |
 | Horatio Nelson Robinson - Algebra - 1866 - 328 pages
...the terms? Ans. 2247. 5. The first terra of an arithmetical series is 6, the last term — • 3^, and the number of terms 20 ; what is the sum of the terms ? Ans. 25. GENERAL APPLICATIONS. 339. In an arithmetical progression there are five parts, as... | |
 | Horatio Nelson Robinson - Algebra - 1874 - 340 pages
...sum of the terms? Ans. 2247. 5. The first term of an arithmetical series is 6, the last term — 3], and the number of terms 20 ; what is the sum of the terms ? Ans. 25. GENERAL APPLICATIONS. 389. In an arithmetical progression there are five parts, as... | |
 | 1875 - 708 pages
...ORAM ORMA OARM OAMR OMRA OMAR RAMO RAOM RMAO RMOA ROAM ROMA THE BA3KET AND THE STONES. If a hundred stones be placed in a straight line, at the distance of a yard from each other, the first being at the same distance from a basket, how many yards must the person walk who engages... | |
 | Lorenzo Fairbanks - 1875 - 472 pages
...number of terms, and divide the product by 2. 1. The extremes of an arithmetical series are 80 and 4, and the number of terms 20 : what is the sum of the series ? 2. How many times does a clock strike in 12 hours ? 3. Suppose 50 eggs to be laid one yard apart... | |
 | Benjamin Greenleaf - Algebra - 1879 - 350 pages
...series ¿ -j- l£-j-2£--f- &c., to twenty terms. Ans. 200. 4. If the first term is 5, the last term 62, and the number of terms 20, what is the sum of the terms ? Ans. 670. 5. The first term of an arithmetical series is — 3j, the common difference £ ;... | |
 | Benjamin Greenleaf - Algebra - 1879 - 376 pages
...the sum of the extremes. EXAMPLES. 1. Find the sum of an arithmetical series, of which the first term is 3, the common difference 2, and the number of terms 20. Ans. 440. 2. If the first term is 7, the common difference — 4, and the number of terms G, what is... | |
 | William Clarke - Amusements - 1880 - 770 pages
...arrangements possible, which would require above thirteen years. THB BASBBT ANН 6TONBS. IS a hundred stenes be placed in a straight line, at the distance of a yard from each other, the first being at the same distance from a basket, how many yards must the person walk who engages... | |
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If the first term of an increasing arithmetical series is 3, the common difference 2, and the number of terms 20 ; what is the sum of the series 1 Ans. 
