http://mathforum.org/kb List of forum topics en http://mathforum.org/kb/thread.jspa?messageID=8098248&tstart=0#8098248 Jan 18, 2013 12:50:22 AM Jan 18, 2013 12:50:22 AM biztvk@nus.edu.sg 0 http://mathforum.org/kb/thread.jspa?messageID=8083001&tstart=0#8083001
$Version

"8.0 for Mac OS X x86 (64-bit) (October 5, 2011)"

Clear[s1,]]> Jan 16, 2013 11:14:22 PM Jan 16, 2013 11:14:22 PM hanlonr357@gmail.com 0 http://mathforum.org/kb/thread.jspa?messageID=8074048&tstart=0#8074048
The following didn't work (I am using version 8):
soln1 = NSolve[{dpi1s1 == 0, dpi2s2 == 0, 0 < s1 < 1,]]> Jan 16, 2013 1:38:15 AM Jan 16, 2013 1:38:15 AM biztvk@nus.edu.sg 0 http://mathforum.org/kb/thread.jspa?messageID=8068770&tstart=0#8068770
trichy

-----Original Message-----
From: Bob Hanlon [mailto:hanlonr357@gmail.com]
Sent: Tuesday, January 15, 2013]]> Jan 14, 2013 11:28:04 PM Jan 14, 2013 11:28:04 PM biztvk@nus.edu.sg 0 http://mathforum.org/kb/thread.jspa?messageID=8068846&tstart=0#8068846
dpi1s1 = Rationalize[
0.3125 - 0.0645 s1^2 + 0.0083205 s1^3 + 0.125 s2^2 +
s1 (-0.26 + (-0.03225 + 0.0645 s2) s2),]]> Jan 14, 2013 11:27:53 PM Jan 14, 2013 11:27:53 PM hanlonr357@gmail.com 0 http://mathforum.org/kb/thread.jspa?messageID=8068845&tstart=0#8068845
I have a simultaneous set of equations in two variables, namely, s1 and s2. See below.

s1 =.; s2 =.; dpi1s1 =.; dpi2s2]]> Jan 14, 2013 11:27:47 PM Jan 14, 2013 11:27:47 PM biztvk@nus.edu.sg 0 http://mathforum.org/kb/thread.jspa?messageID=8066566&tstart=0#8066566
"9.0 for Mac OS X x86 (64-bit) (November 20, 2012)"

a = x z + 2 x y + 2 y z;
v = x y z;

a2 = a /. x -> 2 z;
v2]]> Jan 14, 2013 12:00:45 AM Jan 14, 2013 12:00:45 AM hanlonr357@gmail.com 0 http://mathforum.org/kb/thread.jspa?messageID=8066573&tstart=0#8066573 ]]> Jan 14, 2013 12:00:44 AM Jan 14, 2013 12:00:44 AM 7