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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. "
An Introduction to Algebra: Being the First Part of a Course of Mathematics ... - Page 216
by Jeremiah Day - 1847 - 332 pages
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Recreations in Mathematics and Natural Philosophy ...

Jacques Ozanam, Jean Etienne Montucla - Mathematics - 1803
...understood, it will be easy to resolve the following questions. PROBLEM I. If a hundred stones are placed in a straight line, at the distance of a yard from each other ; how many yards must the person walk, u-ho undertakes to pick them itp one fy onet, and to put them into...
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A Complete Treatise on Arithmetic, Rational and Practical: Wherein the ...

Paul Deighan - Arithmetic - 1804
...2O. Given ^=4, «=i2, /~324, required a? 2« 21. The firft term of an increafing Arithmetical feries is 3, the common difference 2, and the number of terms 20 ; required the fum of the feries ? Ant, 440. 22. The firft term of a decreafing Arithmetical feries...
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An Introduction to Algebra: With Notes and Observations; Designed for the ...

John Bonnycastle - Algebra - 1806 - 208 pages
...term of a, a+x, a+2x, a+¡x, to EXAMPLES. - • i. Ths firft term of an increafing arithmetical feries is 3, the common difference 2, and the number of terms 20 ; required the fum of the feries. ^19 Firft, 3 + 2X(zo—i) =3+19=3+38 «=41 *slaß term* And, (3+41...
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An Introduction to Algebra: With Notes and Observations: Designed for the ...

John Bonnycastle - Algebra - 1811 - 220 pages
...a + x, a + Zx, a + 3x, to a + mx, is = (a+a+mx) — =(a+-Jm^) . n = (a-| — — — EXAMPLES. . I. The first term of an increasing arithmetical series...the common difference 2, and the number of terms 20 ; required the sum of the series. first, 3 + 2x(20 — 1)=3 + 2 x!9 = 3 + 38=41= ast term. 20 20 ^nrf(3...
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A Course of Mathematics ...: Composed for the Use of the Royal Military ...

Charles Hutton - Mathematics - 1811
...they meet ? ; Ans. 69£ miles from Exeter. QuEsT^,25. One hundred eggs being placed on the ground, in a straight line, at the distance of a yard from each other : How far will a person travel who shall bring them one by one to a basket, which is placed at one yard from...
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A Course of Mathematics: For the Use of Academies as Well as ..., Volume 1

Charles Hutton - Mathematics - 1812
...will they meet ? Ans. 69^. miles from Exeter. QUEST. 25. One hundred eggs being placed on the ground, in a straight line, at the distance of a yard from each other: How far .will a person travel who shall bring them one by one to a basket, which is placed at one yard from...
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A Treatise on Algebra, in Practice and Theory: With Notes and Illustrations ...

John Bonnycastle - Algebra - 1813
...(a — 2d) + (a — 3d) + (a — 4d), &c. to » terms, is = 2a — (n — I )dx ^ (¿). EXAMPLES. 1. The first term of an increasing arithmetical series is 3, the common difference 2, and the numof terms 20; required the sum of the series. First, 3 + 2(20- 1) =3 + 2 x 19=3 + 38 = 41, the last...
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An Introduction to Algebra: With Notes and Observations : Designed for the ...

John Bonnycastle - Algebra - 1818 - 260 pages
...of the quantities, a, d, n, S, be given, the fourth may be tound trom the equation EXAMPLES. . .. 1. The first term of an increasing arithmetical series...the common difference 2, and the number of terms 20 ; required |he sum of the series. • - • First, 3+2(20- 1)=3+2X 19=3+38=41, the last term. 20 20...
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An Introduction to Algebra: With Notes and Observations : Designed for the ...

John Bonnycastle - Algebra - 1818 - 260 pages
...3 21 ; required the sum of the series. Ans. 140. 8. One hundred stones being placed on the ground, in a straight line, at the distance of a yard from each other ; how far will a person travel, who shall bring them one by one. to a basket, placed at the distance of a yard...
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An Introduction to Algebra: Being the First Part of a Course of Mathematics ...

Jeremiah Day - Algebra - 1820 - 332 pages
...the common difference. ^ ' /t - n s — 2a + d, 4. w= ------------ ^-3 -- the number of termsEx. 1. If the first term of an increasing arithmetical series...number of terms 20 ; what is the sum of the series ? Ans. 440. 2. If 1 00 stones are placed in a straight line, at the distance of a yard from each other...
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