Elements of analytical geometry and the differential and integral calculus (1856)
Robinson, Horatio N. (Horatio Nelson), 1806-1867 · Cincinnati : J. Ernst · leaf 19
t is, it applies to any pointM on the line AL, because we can make aj greater or less, andPJf will be greater or less in like proportion, and J!f will movealong on the line AL as we move P on the line AX. Becausethe point JSfwill continue on the line -4Athrough all changes of a?and y, we say that… … STRAIGHT LINES. U con esponding value of y will be PM\ and being below the lineXX will therefore be minus. Therefore ±y=±aiP is the general equation of the line LL, extending indefinitely ineither direction. . If the tangent a becomes less, the line will incline more to-wards the line XX. When a=0…
Geometry, Analytic · Calculus
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