 | Colin MacLaurin - 1801 - 428 σελίδες
...that is, whether x increases or decreases with respect to the other fluents. Invariable quantities are represented by the first letters of the alphabet, as a, b, c, &.C.. These have no fluxions ; and, in the same manner, when any fluxion is supposed constant, its... | |
 | 1801 - 446 σελίδες
...or universal way of computation. 2. In Algebra, the given, or known, quantities are usually denoted by the first letters of the alphabet, as a, b, c, d, &c. and the unknown, or required quantities, by the last letters, as x,y,z. NOTE. The signs, or characters,... | |
 | Charles Hutton - 1815 - 686 σελίδες
...quantities are either given and known, or else they are unknown and sought. The given or known quantities are usually represented by the first letters of the alphabet, as a, b, c, d, e, &c, and the unknown or required quantities, by the" last letters, as z, y, x, w, &c. and also indeterminate,... | |
 | Silas Totten - 1836 - 320 σελίδες
...it is proposed to determine others which are Tinknown ; and it is usual to express known quantities by the first letters of the alphabet, as a, b, c, d, &c., and unknown quantities by the last, as x, y, z, t, u, &c. The signs which denote algebraic operations... | |
 | Andrew Bell (writer on mathematics.) - 1839 - 500 σελίδες
...and unknown quantities are those whose numerical values are not known. Known quantities are commonly represented by the first letters of the alphabet, as a, b, c, ; and unknown quantities by the last letters, as x, y, z, (13.) The sign of equality, =, enunciated... | |
 | Ebenezer Bailey - 1842 - 264 σελίδες
...either are, or are. supposed to be, determined, by letters. These are called known quantities, and are usually represented by the first letters of the alphabet, as a, b, c. 2. John is four times as old as James, and the sum of their ages is 20 years. What is the age of each... | |
 | Joseph Ray - 1848 - 252 σελίδες
...quantities are those whose numerical values are not known. ART. 17. Known quantities are generally represented by the first letters of the alphabet, as a, b, c, &c.; and unknown quantities by the last letters, as x, y, z. ART. 18. The following are the principal... | |
 | Joseph Ray - 1848 - 250 σελίδες
...quantities are those whose numerical values are not known. ART. 17. Known quantities are generally represented by the first letters of the alphabet, as a, b, c, &c.; and unknown quantities by the last letters, as x, y, z. ART. 18. The following are the principal... | |
 | Joseph Ray - 1852 - 408 σελίδες
...letters, and signs. The letters and signs are often called symbols. ART. 6. Known quantities are generally represented by the first letters of the alphabet, as a, b, c, &c. ; and unknown quantities by the last letters, as t, v, x, y, z. ART. 7. The principal signs used... | |
 | John Robertson (LL.D., of Upton Park sch.) - 1861 - 140 σελίδες
...application far more extensive. Quantities whose values are known or determined are usually expressed by the first letters of the alphabet, as a, b, c, d, fyc. ; and unknown or undetermined quantities by the last, as x, y, z, fyc. The characters +, —,... | |
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Quantities, or those whose values are given, when not expressed by figures, are usually represented by the first letters of the alphabet, as a, b, c. 
