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" ... both ; that is. their half sum, or their half difference, or a mean proportional between them, or &c., and we shall always arrive at an equation more simple than by employing either the one or the other. "
An Elementary Treatise on Plane and Spherical Trigonometry and on the ... - Page 94
by Silvestre François Lacroix - 1826 - 165 pages
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Higher Geometry and Trigonometry: Being the Third Part of a Series on ...

Nathan Scholfield - Conic sections - 1845 - 244 pages
...we ought to employ neither of these, but take for the unknown quantity one which depends equally on both ; that is. their half sum, or their half difference,...simple than by employing either the one or the other. 4. The question we have resolved, (Prob. VI,) may be used to illustrate what is here said. In this...
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Elements of plane (solid) geometry (Higher geometry) and trigonometry (and ...

Nathan Scholfield - 1845 - 894 pages
...foreseen that such would lead to the tame equation, (the signs + and — exccpted) ; then we ought to employ neither of these, but take for the unknown quantity one which depends equally on both ; that is, their half sum, or their half difference, or a mean proportional between them, or...
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A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ...

Nathan Scholfield - Conic sections - 1845 - 542 pages
...foreseen that such would lead to the same equation, (the signs + and — excepted) ; then we ought to employ neither of these, but take for the unknown quantity one which depends equally on both ; that is. their half sum, or their half difference, or a mean proportional between them, or...
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Higher Geometry and Trigonometry: Being the Third Part of a Series on ...

Nathan Scholfield - Geometry - 1845 - 506 pages
...foreseen that such would lead to the tame equation, (the signs + and — excepted) ; then we ought to employ neither of these, but take for the unknown quantity one which depends equally on both ; that is, their half sum, or their half difference, or a mean proportional between them, or...
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Elemento of Geometry, Theoretical and Practical: Containing a Full ...

George Clinton Whitlock - Mathematics - 1848 - 338 pages
...foreseen that each would lead to the same equation (the signs -\- and — excepted) ; then we ought to employ neither of these, but take for the unknown...difference, or a mean proportional between them, or, &c." Thus, suppose it were required to find two numbers such that their sum should be 4 and the sum of their...
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Elements of Geometry, Theoretical and Practical: Containing a Full ...

George Clinton Whitlock - Mathematics - 1848 - 340 pages
...be foreseen that each would lead to the same equation (the signs + and — excepted) ; then we ought to employ neither of these, but take for the unknown...difference, or a mean proportional between them, or, 4fcc." Thus, suppose it were required to find two numbers such that their sum should be 4 and the sum...
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