Elements of analytical geometry and the differential and integral calculus (1856)
Robinson, Horatio N. (Horatio Nelson), 1806-1867 · Cincinnati : J. Ernst · leaf 234
ial coefficient is always positive for allvalues of x, (except a;=a). Then for all positive values of y,the curve will be convex, and for all negativevalues of y, concave towards the axis ofX, as this last figure illustrates. The tangent at the point M, in bothcases, is perpendicular to the axis of…
Geometry, Analytic · Calculus
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