Woods, Frederick S. (Frederick Shenstone), 1864-, Bailey, Frederick H. (Frederick Harold), 1865- · Boston, New York [etc.] Ginn and Company · leaf 42
x + 2) V-(a; + 4)(x-4). The lines x = — 4 and x = 4 divide the plane(fig. 29) into three sections. If — 4 < x < 4, the radical is real and there is apart of the graph in the corresponding portion ofthe plane. If x<— 4 or x > 4, the radical is imagi-nary; and since in the corresponding… … y 3 x + 9, Fig. 29 or, after the expression under the radical sign has been factored, y = 2±V-2(*-|)(* + 8> The lines x = — 3 and x = •?, dividethe plane (fig. 30) into three sections,and proceeding as before, we find thatthe curve is entirely in the middlesection (that is, when — 3 <x <…
Geometry, Analytic · Calculus
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