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 Author Comment/Response Madhusudan Singh 12/10/99 05:50am I tried to evaluate the following expressions: In[1]:= b0 = FindRoot[0.5 (1 - b) == ArcTan[(1 - b)/(1 +b)], {b, 0}] f[x_] = x^2 + 5 x + 16 f[b0] f[x] /. b0 Out[1]= {b -> 0.998126} Out[2]=\!\(16 + 5\ x + x\^2\) Out[3]= \!\({16 + 5\ \((b -> 0.9981258021522373`)\) + \((b->0.9981258021522373`)\)\$ Out[4]=\!\(16 + 5\ x + x\^2\) ------- Please ignore the control sequences (they are just a quirk of the cut and paste.). What I am trying to do is : 1. Find the root of a transcendental equation. 2. Use that in another expression to find the value of a quantity. Isn't the way shown above the correct thing to do ? This kind of an output is quite useless for me if I have to do a complicated multi-step calculation.    I am new to Mathematica. Madhusudan Singh. URL: ,

 Subject (listing for 'Cannot use results of a previous evaluation.') Author Date Posted Cannot use results of a previous evaluation. Madhusudan S... 12/10/99 05:50am Re: Cannot use results of a previous evaluation. Forum Modera... 12/10/99 07:15am
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