Woods, Frederick S. (Frederick Shenstone), 1864-, Bailey, Frederick H. (Frederick Harold), 1865- · Boston, New York [etc.] Ginn and Company · leaf 40
ection of the plane. If 1 < x < .>, the firsttwo factors are positive and the thirdis negative; hence the radical isimaginary and there can be no partof the graph in the correspondingsection of the plane. Finally, ifx > 5, all three factors are positive;hence the radical is real and… … 24 GRAPHS OF ALGEBRAIC FUNCTIONS Ex. 2. y = ± V(jc + 2)(a; - l)8. This will be written as i/ = ±(x-l)Vx + 2. The line x = — 2 divides the plane (fig. 27)into two sections. Proceeding as in the previous example, wefind the radical to be real if x > — 2 andimaginary if x < — 2. Therefore there…
Geometry, Analytic · Calculus
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