\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
The table of variations for a function \(f\) defined on \([0, +\infty[\) is given below:
Justify that the equation \(f(x) = 0\) has a unique solution on the interval \([0, +\infty[\).
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