Elements of analytical geometry and of the differential and integral calculus (1866)
Davies, Charles, 1798-1876 · New York, Barnes & Co. · leaf 225
cannot bediminished, according to the lawof change, without becoming 0. If, in the equation of the curve, y =fix) . . (1.) ic has a particular value OP, ywill denote the ordinate PM, If X be increased by PQ, de-noted by A, PiKf will change toQN, which we will denote by y\ and we shall have,… … Let US suppose, -as before, that the abscis x has increased fromOP to OQ, aud that the cor-responding ordinate y, has be-come 2/. Draw through thepoints iV and 3/, the secantline iV^J/i If, now, we supposethe point iV to approach 3f,till it becomes consecutive withit, then, 1. The secant line will…
Geometry, Analytic · Calculus
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