Woods, Frederick S. (Frederick Shenstone), 1864-, Bailey, Frederick H. (Frederick Harold), 1865- · Boston, New York [etc.] Ginn and Company · leaf 185
no finite value of x makes —2. = 0. If a: < 2, ^ > 0; and if a: > 2, f—£ < 0. Hence the point dx* dx l Fig. 136 for which x — 2 is a point of inflection, since on the left of that point the curve is concave upward and on the right of that point it is concave downward (fig. 130). The… … the value a and /(«) is finite, f(a) is called a maximum value of/(.>) (figs. 137, 138); and if f(x) changes from a decreasing O x=a Fig. 139
Geometry, Analytic · Calculus
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