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May 28, 2016
Posted by **Rikki ** on Wednesday, November 16, 2011 at 12:23pm.

x''(t)=-x-A(x^2-1)x'(t)

x(0)= 0.5

x'0)= 0

''= 2nd order,'= 1st order

where A is a positive constant.As the value of A increases this equation becomes increasingly stiff.

Convert this equation to two first-order equations.

please show working