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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.

Let f f be a twice differentiable function, and let f(1)=7 f(1)=-7 , f(1)=0 f^{\prime}(1)=0 , and f(1)=2 f^{\prime \prime}(1)=-2 .\newlineWhat occurs in the graph of f f at the point (1,7) (1,-7) ?\newlineChoose 11 answer:\newline(A) (1,7) (1,-7) is a minimum point.\newline(B) (1,7) (1,-7) is a maximum point.\newline(C) There's not enough information to tell.

Full solution

Q. Let f f be a twice differentiable function, and let f(1)=7 f(1)=-7 , f(1)=0 f^{\prime}(1)=0 , and f(1)=2 f^{\prime \prime}(1)=-2 .\newlineWhat occurs in the graph of f f at the point (1,7) (1,-7) ?\newlineChoose 11 answer:\newline(A) (1,7) (1,-7) is a minimum point.\newline(B) (1,7) (1,-7) is a maximum point.\newline(C) There's not enough information to tell.
  1. Analyze Function's Derivatives: To determine the nature of the point (1,7)(1,-7) on the graph of the function ff, we need to analyze the given information about the function's first and second derivatives at the point x=1x = 1.
  2. First Derivative at x=1x = 1: The first derivative of the function ff at x=1x = 1 is given as f(1)=0f'(1) = 0. This indicates that the slope of the tangent to the graph of ff at x=1x = 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.
  3. Second Derivative at x=1x = 1: The second derivative of the function ff at x=1x = 1 is given as f(1)=2f''(1) = -2. Since the second derivative is negative, it tells us that the graph of ff is concave down at x=1x = 1. This implies that the point (1,7)(1,-7) is a local maximum.
  4. Conclusion: Given the information that f(1)=0f'(1) = 0 and f(1)=2f''(1) = -2, we can conclude that the point (1,7)(1,-7) is a local maximum point on the graph of the function ff.

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