The positive interval of a function is when the function has positive values.
<em>The interval in which both f(x) and g(x) are positive is </em><em />
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From the given graphs of g(x), we have the following observations.
- <em>The graph of f(x) crosses the x-axis at </em>
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- <em>The graph of g(x) also crosses the x-axis at </em>
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This means that:
<em /><em> --- for both functions</em>
But when x increases, the value of y becomes positive,
<em>So, the positive interval of f(x) and g(x) is </em><em />
Read more about positive intervals at: