Solving equations that are first parametrically solved

2014 12 5
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更新时间：2014 12 7
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Hi All
if I solve a set of equations first parametrically and I end in something like : C = a^2 + 2 * b +1/R
and then I want to put numbers in a and b and R and get a result for C , how do I do that ?
I mean the code is initiated with
syms a , b , R

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Mischa Kim
Mischa Kim 2014-12-7

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Farzad, you want to use the subs command
syms a b R
C = a^2 + 2 * b + 1/R;
C_num = subs(C,{a,b,R},{1,2,3})
C_num =
16/3

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