Woods, Frederick S. (Frederick Shenstone), 1864-, Bailey, Frederick H. (Frederick Harold), 1865- · Boston, New York [etc.] Ginn and Company · leaf 322
equation in rectangular spaa coordinates is a plane. + !>//-, where a > 0 Ex. 2. s&>0. Placing 2 = 0, we have a./2 + by* = 0, and hence the XOY plane surface in a point (fig. L88) ,j = (), we have z = il.i-, which is the equation of a with its vertex at 0 ami its axis along OZ. Placing… … b (1) and As the -1 \ -1 which is the equation of an ellipse with semiaxes \ (I \ h plane recedes from the origin, i.e. as -n increases, it is evident thai the ellipse increases in magnitude. It is also evident thai the ends of the axes of the ellipse lie on the parabolas (•_) and (:>). If we…
Geometry, Analytic · Calculus
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