Explanation Given: Function f ( x , y ) = x 3 + y 2 − 3 x 2 + 10 y + 6 . Formula Used: Critical points of the function are the points where the function is defined and its derivative is undefined or zero. Mathematically, f x ( x 0 , y 0 ) = 0 f y ( x 0 , y 0 ) = 0 Let us assume that ( x 0 , y 0 ) is the critical point of a continuous function f and D be calculated as follows: D = f x x ( x 0 , y 0 ) f y y ( x 0 , y 0 ) − f x y ( x 0 , y 0 ) 2 Then, If D > 0 and f x x ( x 0 , y 0 ) > 0 , then the function has local minimum at ( x 0 , y 0 ) . If D > 0 and f x x ( x 0 , y 0 ) < 0 , then the function has local maximum at ( x 0 , y 0 ) . If D < 0 , then the function has saddle point at ( x 0 , y 0 ) . If D = 0 , then test is inconclusive. Calculation: Function is given as f ( x , y ) = x 3 + y 2 − 3 x 2 + 10 y + 6 Differentiate f ( x , y ) with respect to x , we get f x ( x , y ) = d d x ( x 3 + y 2 − 3 x 2 + 10 y + 6 ) f x ( x , y ) = 3 x 2 + 0 − 6 x + 0 + 0 f x ( x , y ) = 3 x 2 − 6 x Differentiate f ( x , y ) with respect to y , we get f y ( x , y ) = d d y ( x 3 + y 2 − 3 x 2 + 10 y + 6 ) f y ( x , y ) = 0 + 2 y − 0 + 10 + 0 f y ( x , y ) = 2 y + 10 To calculate the critical point, put f x ( x 0 , y 0 ) = 0 and f y ( x 0 , y 0 ) = 0 , we have 3 x 2 − 6 x = 0 3 x ( x − 2 ) = 0 x = 0 , 2 and 2 y + 10 = 0 y = − 5 Thus, critical points are ( 0 , − 5 ) and ( 2 , − 5 )

Applied Calculus, 6e WileyPLUS + Loose-leaf

6th Edition

ISBN: 9781119408901

Author: Deborah Hughes-Hallett, Andrew M. Gleason, Patti Frazer Lock, Daniel E. Flath

Publisher: Wiley (WileyPLUS Products)

See similar textbooks

Videos

Question

Chapter 8.5, Problem 19P

To determine

To find all critical points for below function and determine each point as local maxima, local minima and saddle point.

f(x,y)=x3+y2−3x2+10y+6

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 8.5, Problem 18P

Chapter 8.5, Problem 20P

Students have asked these similar questions

3.1 Limits 1. If lim f(x)=-6 and lim f(x)=5, then lim f(x). Explain your choice. x+3° x+3* x+3 (a) Is 5 (c) Does not exist (b) is 6 (d) is infinite

1 pts Let F and G be vector fields such that ▼ × F(0, 0, 0) = (0.76, -9.78, 3.29), G(0, 0, 0) = (−3.99, 6.15, 2.94), and G is irrotational. Then sin(5V (F × G)) at (0, 0, 0) is Question 1 -0.246 0.072 -0.934 0.478 -0.914 -0.855 0.710 0.262 .

2. Answer the following questions. (A) [50%] Given the vector field F(x, y, z) = (x²y, e", yz²), verify the differential identity Vx (VF) V(V •F) - V²F (B) [50%] Remark. You are confined to use the differential identities. Let u and v be scalar fields, and F be a vector field given by F = (Vu) x (Vv) (i) Show that F is solenoidal (or incompressible). (ii) Show that G = (uvv – vVu) is a vector potential for F.

Chapter 8 Solutions

Applied Calculus, 6e WileyPLUS + Loose-leaf

Ch. 8.1 - Prob. 1P Ch. 8.1 - Prob. 2P Ch. 8.1 - Prob. 3P Ch. 8.1 - Prob. 4P Ch. 8.1 - Prob. 5P Ch. 8.1 - Prob. 6P Ch. 8.1 - Prob. 7P Ch. 8.1 - Prob. 8P Ch. 8.1 - Prob. 9P Ch. 8.1 - Prob. 10P

Ch. 8.1 - Prob. 11P Ch. 8.1 - Prob. 12P Ch. 8.1 - Prob. 13P Ch. 8.1 - Prob. 14P Ch. 8.1 - Prob. 15P Ch. 8.1 - Prob. 16P Ch. 8.1 - Prob. 17P Ch. 8.1 - Prob. 18P Ch. 8.1 - Prob. 19P Ch. 8.1 - Prob. 20P Ch. 8.1 - Prob. 21P Ch. 8.1 - Prob. 22P Ch. 8.1 - Prob. 23P Ch. 8.1 - Prob. 24P Ch. 8.1 - Prob. 25P Ch. 8.1 - Prob. 26P Ch. 8.1 - Prob. 27P Ch. 8.1 - Prob. 28P Ch. 8.1 - Prob. 29P Ch. 8.1 - Prob. 30P Ch. 8.2 - Prob. 1P Ch. 8.2 - Prob. 2P Ch. 8.2 - Prob. 3P Ch. 8.2 - Prob. 4P Ch. 8.2 - Prob. 5P Ch. 8.2 - Prob. 6P Ch. 8.2 - Prob. 7P Ch. 8.2 - Prob. 8P Ch. 8.2 - Prob. 9P Ch. 8.2 - Prob. 10P Ch. 8.2 - Prob. 11P Ch. 8.2 - Prob. 12P Ch. 8.2 - Prob. 13P Ch. 8.2 - Prob. 14P Ch. 8.2 - Prob. 15P Ch. 8.2 - Prob. 16P Ch. 8.2 - Prob. 17P Ch. 8.2 - Prob. 18P Ch. 8.2 - Prob. 19P Ch. 8.2 - Prob. 20P Ch. 8.2 - Prob. 21P Ch. 8.2 - Prob. 22P Ch. 8.2 - Prob. 23P Ch. 8.2 - Prob. 24P Ch. 8.2 - Prob. 25P Ch. 8.2 - Prob. 26P Ch. 8.2 - Prob. 27P Ch. 8.2 - Prob. 28P Ch. 8.2 - Prob. 29P Ch. 8.2 - Prob. 30P Ch. 8.2 - Prob. 31P Ch. 8.2 - Prob. 32P Ch. 8.2 - Prob. 33P Ch. 8.2 - Prob. 34P Ch. 8.2 - Prob. 35P Ch. 8.2 - Prob. 36P Ch. 8.2 - Prob. 37P Ch. 8.2 - Prob. 38P Ch. 8.2 - Prob. 39P Ch. 8.2 - Prob. 40P Ch. 8.2 - Prob. 41P Ch. 8.2 - Prob. 42P Ch. 8.2 - Prob. 43P Ch. 8.2 - Prob. 44P Ch. 8.3 - Prob. 1P Ch. 8.3 - Prob. 2P Ch. 8.3 - Prob. 3P Ch. 8.3 - Prob. 4P Ch. 8.3 - Prob. 5P Ch. 8.3 - Prob. 6P Ch. 8.3 - Prob. 7P Ch. 8.3 - Prob. 8P Ch. 8.3 - Prob. 9P Ch. 8.3 - Prob. 10P Ch. 8.3 - Prob. 11P Ch. 8.3 - Prob. 12P Ch. 8.3 - Prob. 13P Ch. 8.3 - Prob. 14P Ch. 8.3 - Prob. 15P Ch. 8.3 - Prob. 16P Ch. 8.3 - Prob. 17P Ch. 8.3 - Prob. 18P Ch. 8.3 - Prob. 19P Ch. 8.3 - Prob. 20P Ch. 8.3 - Prob. 21P Ch. 8.3 - Prob. 22P Ch. 8.3 - Prob. 23P Ch. 8.3 - Prob. 24P Ch. 8.3 - Prob. 25P Ch. 8.3 - Prob. 26P Ch. 8.3 - Prob. 27P Ch. 8.3 - Prob. 28P Ch. 8.3 - Prob. 29P Ch. 8.3 - Prob. 30P Ch. 8.3 - Prob. 31P Ch. 8.3 - Prob. 32P Ch. 8.3 - Prob. 33P Ch. 8.3 - Prob. 34P Ch. 8.3 - Prob. 35P Ch. 8.3 - Prob. 36P Ch. 8.3 - Prob. 37P Ch. 8.3 - Prob. 38P Ch. 8.3 - Prob. 39P Ch. 8.3 - Prob. 40P Ch. 8.4 - Prob. 1P Ch. 8.4 - Prob. 2P Ch. 8.4 - Prob. 3P Ch. 8.4 - Prob. 4P Ch. 8.4 - Prob. 5P Ch. 8.4 - Prob. 6P Ch. 8.4 - Prob. 7P Ch. 8.4 - Prob. 8P Ch. 8.4 - Prob. 9P Ch. 8.4 - Prob. 10P Ch. 8.4 - Prob. 11P Ch. 8.4 - Prob. 12P Ch. 8.4 - Prob. 13P Ch. 8.4 - Prob. 14P Ch. 8.4 - Prob. 15P Ch. 8.4 - Prob. 16P Ch. 8.4 - Prob. 17P Ch. 8.4 - Prob. 18P Ch. 8.4 - Prob. 19P Ch. 8.4 - Prob. 20P Ch. 8.4 - Prob. 21P Ch. 8.4 - Prob. 22P Ch. 8.4 - Prob. 23P Ch. 8.4 - Prob. 24P Ch. 8.4 - Prob. 25P Ch. 8.4 - Prob. 26P Ch. 8.4 - Prob. 27P Ch. 8.4 - Prob. 28P Ch. 8.4 - Prob. 29P Ch. 8.4 - Prob. 30P Ch. 8.4 - Prob. 31P Ch. 8.4 - Prob. 32P Ch. 8.4 - Prob. 33P Ch. 8.4 - Prob. 34P Ch. 8.4 - Prob. 35P Ch. 8.4 - Prob. 36P Ch. 8.4 - Prob. 37P Ch. 8.4 - Prob. 38P Ch. 8.4 - Prob. 39P Ch. 8.4 - Prob. 40P Ch. 8.4 - Prob. 41P Ch. 8.4 - Prob. 42P Ch. 8.4 - Prob. 43P Ch. 8.4 - Prob. 44P Ch. 8.5 - Prob. 1P Ch. 8.5 - Prob. 2P Ch. 8.5 - Prob. 3P Ch. 8.5 - Prob. 4P Ch. 8.5 - Prob. 5P Ch. 8.5 - Prob. 6P Ch. 8.5 - Prob. 7P Ch. 8.5 - Prob. 8P Ch. 8.5 - Prob. 9P Ch. 8.5 - Prob. 10P Ch. 8.5 - Prob. 11P Ch. 8.5 - Prob. 12P Ch. 8.5 - Prob. 13P Ch. 8.5 - Prob. 14P Ch. 8.5 - Prob. 15P Ch. 8.5 - Prob. 16P Ch. 8.5 - Prob. 17P Ch. 8.5 - Prob. 18P Ch. 8.5 - Prob. 19P Ch. 8.5 - Prob. 20P Ch. 8.5 - Prob. 21P Ch. 8.5 - Prob. 22P Ch. 8.5 - Prob. 23P Ch. 8.5 - Prob. 24P Ch. 8.5 - Prob. 25P Ch. 8.5 - Prob. 26P Ch. 8.5 - Prob. 27P Ch. 8.5 - Prob. 28P Ch. 8.5 - Prob. 29P Ch. 8.5 - Prob. 30P Ch. 8.5 - Prob. 31P Ch. 8.5 - Prob. 32P Ch. 8.6 - Prob. 1P Ch. 8.6 - Prob. 2P Ch. 8.6 - Prob. 3P Ch. 8.6 - Prob. 4P Ch. 8.6 - Prob. 5P Ch. 8.6 - Prob. 6P Ch. 8.6 - Prob. 7P Ch. 8.6 - Prob. 8P Ch. 8.6 - Prob. 9P Ch. 8.6 - Prob. 10P Ch. 8.6 - Prob. 11P Ch. 8.6 - Prob. 12P Ch. 8.6 - Prob. 13P Ch. 8.6 - Prob. 14P Ch. 8.6 - Prob. 15P Ch. 8.6 - Prob. 16P Ch. 8.6 - Prob. 17P Ch. 8.6 - Prob. 18P Ch. 8.6 - Prob. 19P Ch. 8.6 - Prob. 20P Ch. 8.6 - Prob. 21P Ch. 8.6 - Prob. 22P Ch. 8.6 - Prob. 23P Ch. 8.6 - Prob. 24P Ch. 8.6 - Prob. 25P Ch. 8.6 - Prob. 26P Ch. 8.6 - Prob. 27P Ch. 8 - Prob. 1SYU Ch. 8 - Prob. 2SYU Ch. 8 - Prob. 3SYU Ch. 8 - Prob. 4SYU Ch. 8 - Prob. 5SYU Ch. 8 - Prob. 6SYU Ch. 8 - Prob. 7SYU Ch. 8 - Prob. 8SYU Ch. 8 - Prob. 9SYU Ch. 8 - Prob. 10SYU Ch. 8 - Prob. 11SYU Ch. 8 - Prob. 12SYU Ch. 8 - Prob. 13SYU Ch. 8 - Prob. 14SYU Ch. 8 - Prob. 15SYU Ch. 8 - Prob. 16SYU Ch. 8 - Prob. 17SYU Ch. 8 - Prob. 18SYU Ch. 8 - Prob. 19SYU Ch. 8 - Prob. 20SYU Ch. 8 - Prob. 21SYU Ch. 8 - Prob. 22SYU Ch. 8 - Prob. 23SYU Ch. 8 - Prob. 24SYU Ch. 8 - Prob. 25SYU Ch. 8 - Prob. 26SYU Ch. 8 - Prob. 27SYU Ch. 8 - Prob. 28SYU Ch. 8 - Prob. 29SYU Ch. 8 - Prob. 30SYU Ch. 8 - Prob. 31SYU Ch. 8 - Prob. 32SYU Ch. 8 - Prob. 33SYU Ch. 8 - Prob. 34SYU Ch. 8 - Prob. 35SYU Ch. 8 - Prob. 36SYU Ch. 8 - Prob. 37SYU Ch. 8 - Prob. 38SYU Ch. 8 - Prob. 39SYU Ch. 8 - Prob. 40SYU Ch. 8 - Prob. 41SYU Ch. 8 - Prob. 42SYU Ch. 8 - Prob. 43SYU Ch. 8 - Prob. 44SYU Ch. 8 - Prob. 45SYU Ch. 8 - Prob. 46SYU Ch. 8 - Prob. 47SYU Ch. 8 - Prob. 48SYU Ch. 8 - Prob. 49SYU Ch. 8 - Prob. 50SYU Ch. 8 - Prob. 51SYU Ch. 8 - Prob. 52SYU Ch. 8 - Prob. 53SYU Ch. 8 - Prob. 54SYU Ch. 8 - Prob. 55SYU Ch. 8 - Prob. 56SYU Ch. 8 - Prob. 57SYU Ch. 8 - Prob. 58SYU Ch. 8 - Prob. 59SYU Ch. 8 - Prob. 60SYU Ch. 8 - Prob. 1FOT Ch. 8 - Prob. 2FOT Ch. 8 - Prob. 3FOT Ch. 8 - Prob. 4FOT Ch. 8 - Prob. 5FOT Ch. 8 - Prob. 6FOT Ch. 8 - Prob. 7FOT

Knowledge Booster

$Calculus$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, calculus and related others by exploring similar questions and additional content below.

To find all critical points for below function and determine each point as local maxima , local minima and saddle point. f ( x , y ) = x 3 + y 2 − 3 x 2 + 10 y + 6

Solution Summary: The author explains the formula used to determine the critical points of a function. The function has local maxima, local minima and saddle points.

Videos

To find all critical points for below function and determine each point as local maxima, local minima and saddle point.

f(x,y)=x3+y2−3x2+10y+6

Want to see the full answer?

Chapter 8 Solutions

To find all critical points for below function and determine each point as local maxima , local minima and saddle point. f ( x , y ) = x 3 + y 2 − 3 x 2 + 10 y + 6

Solution Summary: The author explains the formula used to determine the critical points of a function. The function has local maxima, local minima and saddle points.

Videos

To find all critical points for below function and determine each point as local maxima, local minima and saddle point. f(x,y)=x3+y2−3x2+10y+6

Want to see the full answer?

Chapter 8 Solutions

To find all critical points for below function and determine each point as local maxima, local minima and saddle point.

f(x,y)=x3+y2−3x2+10y+6