Question

15. Find the critical points of the function f(x, y) = y3 - 6y? - 2x3 - 6x2 +48x+20. Then, use the Second Derivative Test to
1 0
Add a comment Improve this question Transcribed image text
Answer #1

Given f(x,y) = y36? 3 २ 2x 61 +48X +20 fez af an 2 .6X-12x+48 fy= df ay 3y2lay fxy= tyn to find critical points ove ay -0 fasecand derivative test. let 0= faxfoy - fxy)? if Dro and fx270 at coitical points it is local monimum Point if D7o and fxicoat (20) fans -1262)-12--36 fyy=616)-12=-12 furfiy =636 )(+12) 432 D- faz fazy - Utory)? 2 = 432-0 4320 forzo -> (3,07 is focaaf (-4,4) fxx=-12(+4)-19 = 48-52= 36 fay= 6(4)-12 = 12 trafyy= (36) (12) = 43? De faufgy - (ay) 437-4032 = 432) fixo (-4,4) pat (2,4) ford=-12120-12 =-36 fyy 614) -12 12 fax fyy? (-36X13) - =-432. D=. fox fyy they, 2 432-(0,2 =-432 20 7 (2,4) is sadd

Add a comment
Know the answer?
Add Answer to:
15. Find the critical points of the function f(x, y) = y3 - 6y? - 2x3...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT