[Show all top banners]

comingsoon
Replies to this thread:

More by comingsoon
What people are reading
Subscribers
:: Subscribe
Back to: Kurakani General Discussion Refresh page to view new replies
 where is my mistake ?
[VIEWED 4009 TIMES]
SAVE! for ease of future access.
Posted on 02-28-11 12:21 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

1) A normal line to the graph of a function f at the point (x,f(x)) is defined to be the line perpendicular to the tangent line at that point . Find the equation of the normal line to the curve  y= ³√x² at the point where x=3
Solution:
the point is (3, 3 2/3).................. [
³√3²=3 2/3]
Now for slope m,
dy/dx=d(x2/3)/dx= 2/3 x-1/3
at poin x=3
2* 3 -1/3/3= 2/(3* 3 1/3) = 2/3 4/3
The line is perpendicular is m=-3 4/3/2
finally the equation of the normal line is
y-32/3/2=
3 4/3/2(x-3)
y=(-3 4/3/2 )x +3 7/2 +3 2/3







 
Posted on 02-28-11 1:32 PM     [Snapshot: 83]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 


A simple mathematical error is what I see (happens all the time). See the last step of your calculation. You missed the denominator 2 in the second term.

y-32/3/2=3 4/3/2(x-3)
y=(-3 4/3/2 )x +3 7/2/2 +3 2/3



 
Posted on 02-28-11 1:44 PM     [Snapshot: 117]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

ok thanks actually I have not that error in my paper (typing error)
so that is right equation ?

 
Posted on 02-28-11 1:48 PM     [Snapshot: 130]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

math to me is like  "kalo ackcheer bhaisi barabar" lol, wow...das ma das jode bis hunchha timro ra mero oth jde kiss hunchh...thats my math right there lol

 
Posted on 02-28-11 1:56 PM     [Snapshot: 144]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

1) Find the slope of the tangent (lets say m)
2) The slope of the line perpendicular to the tangent would be -1/m
3) Use the slope in the equation: y-y1 = m(x-x1) at the given points.

Good luck!

 
Posted on 02-28-11 2:02 PM     [Snapshot: 163]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

yas , thats i did. But the ans seems like a jokker.

 
Posted on 02-28-11 2:08 PM     [Snapshot: 192]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

@Grace_S ,
can you give me rough idea for this question,
when f is defined by f(x)=√x , find a so that f'(a) is three times value of f'(2)
I find f'(2)=1/(2
√2)
so , f'(a)=3/
(2√2)
but I don't know how to find a ? do you have any idea on it?

 
Posted on 03-01-11 8:27 AM     [Snapshot: 499]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

@terobaaje :: that is soo gay daju, made my morning though
 
Posted on 03-02-11 12:35 PM     [Snapshot: 712]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

comingsoon, did you solve for an 'a'? These kinds of problems are like solving mysteries; the more you do, the better is the fun!

 
Posted on 03-02-11 2:17 PM     [Snapshot: 784]     Reply [Subscribe]
Login in to Rate this Post:     0       ?        
 

Is this correct ??

the point is (3, 3 2/3).................. [³√3²=3 2/3]
Now for slope m,
dy/dx=d(x2/3)/dx= 2/3 x-1/3
at poin x=3
2* 3 -1/3/3= 2*(
3 -1/3* 3 -1) = 2*3 -4/3

The line is perpendicular is m=-2-1*3 4/3

finally the equation of the normal line is
y-32/3=
-2-1*3 4/3(x-3)

y =
-2-1*3 4/3 x + 2-1*32/3 +2-1*3 7/3

OR
y=(-3 4/3/2 )x +
3 2/3 +3 7/3/2


 


Please Log in! to be able to reply! If you don't have a login, please register here.

YOU CAN ALSO



IN ORDER TO POST!




Within last 90 days
Recommended Popular Threads Controvertial Threads
What stocks to buy -- Any recommendation
ट्रंप २०२०
❤️ सम्मर लभ ❤️
हाकिमनी संग- आज सुक्रबार -३
दलित जगारण मोर्चा
I m offered a Job in Bank in Nepal, should i go back ?
आयाहूआस्का
श्राद्द
सान भिनाजु लाई अझै पैसो कमाउने आइडिया
The Facebook Surprise
640 doctors come forward to claim Covid 19 is a global scam
Sajha Chat
मलाई ब्रेड खायो कि सारै पाद आउछ..
जोइटीन्ग्रे aka अमेरिकन नागरिक
यसरी मेरो कुमारत्व गुमेको थियो
Nepalese for JOE BIDEN
साम्राज्ञीले दुर्ब्यबहार भयो, भन्दा भुवन केसिलाइ किन रिस उठ्यो ??
सोनीकाले त बेज्जत गरिन त ( viewers discretion)
Nas!!! this one's for you
Help Aryan fight brain cancer!
NOTE: The opinions here represent the opinions of the individual posters, and not of Sajha.com. It is not possible for sajha.com to monitor all the postings, since sajha.com merely seeks to provide a cyber location for discussing ideas and concerns related to Nepal and the Nepalis. Please send an email to admin@sajha.com using a valid email address if you want any posting to be considered for deletion. Your request will be handled on a one to one basis. Sajha.com is a service please don't abuse it. - Thanks.

Sajha.com Privacy Policy

Like us in Facebook!

↑ Back to Top
free counters