Assigning (really dumb question)
- To: mathgroup at smc.vnet.net
- Subject: [mg60988] Assigning (really dumb question)
- From: vjp2.at at at.BioStrategist.dot.dot.com
- Date: Thu, 6 Oct 2005 04:08:30 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
What the heck am I doing wrong? I've been away from Mathematica for a while. I can't get it to evaluate the expressions at the solved values. I feel so stupid. r[q_] := 1800 q - .006 q^2 c[q_] := 12100000 + 800 q + .004 q ^2 qa = Solve[ D[ r[q]-c[q] , q] == 0, q] r[q] /. q -> qa c[q] /. q -> qa r[q]-c[q] /. q -> qa D[r[q],q] /. q -> qa D[c[q],q] /. q -> qa qm = Solve[ c[q]/q - D[c[q] , q] == 0, q] [[2]] r[qm] /. q -> qm c[qm] /. q -> qm r[qm]-c[qm] /. q -> qm D[r[q],q] /. q -> qm D[c[q],q] /. q -> qm (PS, a while back I was asking how to fix DOS 2.2.2 when it wasn't doing graphics and I was told it was no longer supported. Well, 2yrs later, dumbo me, realised I just had to cd into the math directory and all was fine.) - = - Vasos-Peter John Panagiotopoulos II, Columbia'81+, Bio$trategist BachMozart ReaganQuayle EvrytanoKastorian http://ourworld.compuserve.com/homepages/vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Fooey on GIU,{MS,X}Windows 4 Bimbos] [Cigar smoke belongs in veg food group]
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