Ask
your own question, for FREE!

Mathematics

OpenStudy (anonymous):

How do you find the lim (-7x^2-8y^2)/(sqrt(-7x^2-8y^2+1)-1) (x,y)->(0,0)? The hint is to rationalize the denominator but I have tried this and it only seems to make things complicated.

Still Need Help?

Join the QuestionCove community and study together with friends!

OpenStudy (anonymous):

Multiple numerator and denominator by conjugate. I'll work it out now.

OpenStudy (anonymous):

I tried that but it made things complicated because of the -1. Did I do something wrong?

OpenStudy (anonymous):

I got...\[\sqrt{1}+1\]

OpenStudy (anonymous):

2

OpenStudy (anonymous):

:)

Still Need Help?

Join the QuestionCove community and study together with friends!

OpenStudy (anonymous):

Perfect!

OpenStudy (anonymous):

ur left with sqrt(-7x^2 - 8x^2 + 1) + 1 , so solving for the limit yields 2

Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!

Join our real-time social learning platform and learn together with your friends!

Latest Questions

solodive:
Idk I'm just curious this isn't for class or anything but how do you take care of

1 minute ago
2 Replies
0 Medals

purplecow:
The graph shows the functions f(x) PX Angie X pate what is the solution to the pair of equations represented by PX and GX Papi write any two solutions for G

3 hours ago
2 Replies
0 Medals

BrokenAngel07:
I wrote this some time ago, idk of it'd be considered a song or something I wrote.

3 hours ago
4 Replies
1 Medal

Olive2006:
Tell me what you think of my story. https://www.wattpad.com/1255046896-unruly-hea

3 hours ago
7 Replies
3 Medals

chocalatechipcookie:
@vocaloid In circle A, marc BC is 67u00b0 and marc EF is 74u00b0: What is mu2220F

3 hours ago
2 Replies
0 Medals

Glyzdl:
Question: Given a 60-u00b5C point charge located at the origin, find the total el

17 hours ago
0 Replies
0 Medals

Glyzdl:
4) A point charge of 3 nC is located at the point (1, 1, 1) in free space. What c

17 hours ago
0 Replies
0 Medals

Sailor:
So. I'm gonna send out another plea for help, and I'm desperate at this point. I need to know what I did wrong here.

20 hours ago
7 Replies
3 Medals

link1234:
what yall think? aye aye aye juice is in wooden box i thought u were gonna shot em first its a different story when ur poppin the percs my demons beatin me

19 hours ago
9 Replies
2 Medals

Sailor:
Could I get help on this? I know that absolute value should be "6th grade knowledge" but this is Algebra 2 we're talking about.

1 day ago
1 Reply
1 Medal