Let f be a twice differentiable function, and let f(1)=−7, f′(1)=0, and f′′(1)=−2.What occurs in the graph of f at the point (1,−7) ?Choose 1 answer:(A) (1,−7) is a minimum point.(B) (1,−7) is a maximum point.(C) There's not enough information to tell.
Q. Let f be a twice differentiable function, and let f(1)=−7, f′(1)=0, and f′′(1)=−2.What occurs in the graph of f at the point (1,−7) ?Choose 1 answer:(A) (1,−7) is a minimum point.(B) (1,−7) is a maximum point.(C) There's not enough information to tell.
Analyze Function's Derivatives: To determine the nature of the point (1,−7) on the graph of the function f, we need to analyze the given information about the function's first and second derivatives at the point x=1.
First Derivative at x=1: The first derivative of the function f at x=1 is given as f′(1)=0. This indicates that the slope of the tangent to the graph of f at x=1 is zero, which means the graph has a horizontal tangent line at this point. This could be indicative of a local maximum, local minimum, or a point of inflection.
Second Derivative at x=1: The second derivative of the function f at x=1 is given as f′′(1)=−2. Since the second derivative is negative, it tells us that the graph of f is concave down at x=1. This implies that the point (1,−7) is a local maximum.
Conclusion: Given the information that f′(1)=0 and f′′(1)=−2, we can conclude that the point (1,−7) is a local maximum point on the graph of the function f.