 | Colin MacLaurin - Calculus - 1801 - 428 pages
...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... | |
 | Charles Hutton - Astronomy - 1815 - 686 pages
...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... | |
 | Algebra - 1838 - 372 pages
...of others, which have with the first known relations, the question is called a problem. The given or known quantities are generally represented by the first letters of the alphabet, a, I, c, d, &c. and the unknown or required quantities by the last letters, x, y, z, &c. 32. The following... | |
 | Andrew Bell (writer on mathematics.) - 1839 - 500 pages
...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 - Algebra - 1842 - 264 pages
...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 - Algebra - 1848 - 250 pages
...supposed to be known : unknown 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 - Algebra - 1852 - 408 pages
...conducted by means of figures, 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... | |
 | Benjamin Greenleaf - 1863 - 338 pages
...represent any quantity whatever, known or unknown. 15. KNOWN QUANTITIES, or those whose values are given, are generally represented by the first letters of the alphabet, as a, b, c. UNKNOWN QUANTITIES, or those whoso values are to be determined, are generally represented by the last... | |
 | Joseph Ray - Algebra - 1866 - 252 pages
...are those whose values are given ; Unknown Quantities, those whose values are to be determined. IT. Known quantities are generally represented by the first letters of the alphabet, as a, b, c, etc.; unknown quantities, by the last letters, as x, y, z. 18. The principal signs used in Algebra are =,... | |
 | Joseph Ray - Algebra - 1852 - 422 pages
...conducted by means of figures, 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... | |
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Known quantities are generally represented by the first letters of the alphabet, as a, b, c, etc. 
