Explain why or why not Determine whether the following statements are true and give an explanation or counterexample. Assume that f is differentiable at the points in question. a. The fact that f x (2, 2) = f y (2, 2) = 0 implies that f has a local maximum , local minimum , or saddle point at (2, 2). b. The function f could have a local maximum at ( a , b ) where f y ( a , b ) ≠ 0. c. The function f could have both an absolute maximum and an absolute minimum at two different points that are not critical points. d. The tangent plane is horizontal at a point on a smooth surface corresponding to a critical point.
Explain why or why not Determine whether the following statements are true and give an explanation or counterexample. Assume that f is differentiable at the points in question. a. The fact that f x (2, 2) = f y (2, 2) = 0 implies that f has a local maximum , local minimum , or saddle point at (2, 2). b. The function f could have a local maximum at ( a , b ) where f y ( a , b ) ≠ 0. c. The function f could have both an absolute maximum and an absolute minimum at two different points that are not critical points. d. The tangent plane is horizontal at a point on a smooth surface corresponding to a critical point.
Solution Summary: The author explains that the function f has a saddle point at (a,b) and the derivative value is zero.
Explain why or why not Determine whether the following statements are true and give an explanation or counterexample. Assume that f is differentiable at the points in question.
a. The fact that fx(2, 2) = fy(2, 2) = 0 implies that f has a local maximum, local minimum, or saddle point at (2, 2).
b. The function f could have a local maximum at (a, b) where
f
y
(
a
,
b
)
≠
0.
c. The function f could have both an absolute maximum and an absolute minimum at two different points that are not critical points.
d. The tangent plane is horizontal at a point on a smooth surface corresponding to a critical point.
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 .
Force with 800 N and 400 N are acting on a machine part at 30° and 60°, respectively with the positive x axis
Find the accumulated amount A, if the principal P is invested at an interest rate of r per year for t years. (Round your answer to the nearest cent.)
P = $13,000, r = 6%, t = 10, compounded quarterly
A = $ 31902
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Find the accumulated amount A, if the principal P is invested at an interest rate of r per year for t years. (Round your answer to the nearest cent.)
P = $140,000, r = 8%, t = 8, compounded monthly
A = $259130.20 X
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Find the present value of $20,000 due in 3 years at the given rate of interest. (Round your answers to the nearest cent.)
(a) 2%/year compounded monthly
(b) 5%/year compounded daily
$
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[-/6.66 Points] DETAILS
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TANAPCALC10 5.3.009.
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Find the accumulated amount after 3 years if $4000 is invested at 3%/year compounded continuously. (Round your answer to the nearest cent.)
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