Analyzing critical points Identify the critical points of the following functions. Then determine whether each critical point corresponds to a local maximum , local minimum , or saddle point. State when your analysis is inconclusive. Confirm your results using a graphing utility. 87. f ( x , y ) = 10 – x 3 – y 3 – 3 x 2 + 3 y 2
Analyzing critical points Identify the critical points of the following functions. Then determine whether each critical point corresponds to a local maximum , local minimum , or saddle point. State when your analysis is inconclusive. Confirm your results using a graphing utility. 87. f ( x , y ) = 10 – x 3 – y 3 – 3 x 2 + 3 y 2
Analyzing critical pointsIdentify the critical points of the following functions. Then determine whether each critical point corresponds to a local maximum, local minimum, or saddle point. State when your analysis is inconclusive. Confirm your results using a graphing utility.
87. f(x, y) = 10 – x3 – y3 – 3x2 + 3y2
Formula Formula A function f(x) attains a local maximum at x=a , if there exists a neighborhood (a−δ,a+δ) of a such that, f(x)<f(a), ∀ x∈(a−δ,a+δ),x≠a f(x)−f(a)<0, ∀ x∈(a−δ,a+δ),x≠a In such case, f(a) attains a local maximum value f(x) at x=a .
The graph of f', the derivative of f, is shown in the graph below. If f(-9) = -5, what is the value of f(-1)?
y
87 19
6
LO
5
4
3
1
Graph of f'
x
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1
1
2
3
4 5
6
7 8 9 10
-1
-2
-3
-4
-5
-6
-7
-8
564%
Let f(x)=−7e^xsinxf'(x)=
Find dydx for y=tan(5x)/7e3x.dy/dx =
Chapter 15 Solutions
Calculus: Early Transcendentals and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition) (Briggs, Cochran, Gillett & Schulz, Calculus Series)
University Calculus: Early Transcendentals (4th Edition)
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