Il in the blanks. et f be a differentiable function. the first derivative of f changes sign from plus to minus at x = a, then f has local at z = a. the first derivative of f changes sign from minus to plus at x = a, then f has local at z = a. the first derivative of f is positive for all real numbers, then the function f is the first derivative of f is negative for all real numbers, then the function f is the second derivative of f is positive for all real numbers, then the graph of f is concave the second derivative of f is negative for all real numbers, then the graph of f is concave

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Domain

In simple mathematics terms, a domain is defined as the space on which all the possible inputs for the function will lie. It can also be expressed as a set of departures for the required function.