how would i find a postive root

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adriana resendez
adriana resendez 2015-3-4
回答： Giorgos Papakonstantinou 2015-3-4
func = @(x) tanh(2*x)/(2*x) = 0.7

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回答（1 个）

Giorgos Papakonstantinou
One way to find the roots is described here. You can then exclude all the non-positive.
Quickly you can do this:
func = @(x) tanh(2.*x)./(2.*x) -0.7
fzero(func, 1)

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