|+++4 |
+ +
ALGEBRA.
Ae) f@) fil)
it H+++
++HH |
3 variations. 3 variations. 2 variations. 2 variations. 2 variations. 2 variations. 1 variation.
1 variation.
1 variation.
no variation. no variation.
+++4++444444
+++++ |
Thus one root lies between — 4 and — 5; a second lies between 0 and — 1, and the third lies between 2 and 3.
EXAMPLES XLVIII. g.
Determine the number and situation of the real roots of :
. 8 —492-624+8=0.
. 24+ 1122+ 8x-—16=0.
1 2 RL = ete 7 SD, 4
§. a§—4a34+2?46x442=0. 6. at—23+x—1=0. 7. 23 — 9324 234 —16=0.
. — 4934692? -122742=0. 8 2+ 08-2024 24—-1=0.
GRAPHICAL REPRESENTATION OF FUNCTIONS.
Coordinates.
608. Two lines drawn at right angles to each other as in Fig. 1 form a simple system of lines of reference. Their
 | An image should appear at this position in the text. To use the entire page scan as a placeholder, edit this page and replace "{{missing image}}" with "{{raw image|Elementary algebra (1896).djvu/498}}". Otherwise, if you are able to provide the image then please do so. For guidance, see Wikisource:Image guidelines and Help:Adding images. |  |
intersection, O, is called the origin. Distances from O along XX' are called abscissas; distances from XX' on a line parallel to Y'Y' are called ordinates.
609. Abscissas measured to the right of the origin are considered positive, and to the left, negative. Ordinates measured above XX' are considered positive, and when taken below XX' are negative.
