• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Mathematics: Post your doubts here!

Messages
821
Reaction score
231
Points
53
can someone who is a genius or knows this help me out...m stuck!!!!PURE MATHEMATICS 2 and 3 a LEVELS!!!!PLZZZ ATTACH A SCAN IF POSSIBLE.....PLZZZZZZZZZZZZZZZZZZ......YA YOU!!!:)
iT IS CHAPTER 3 THATS LOGARITHSMS....HELPE PLZZZ ASAP!!!:)
 
Messages
1,857
Reaction score
2,374
Points
273
iT IS CHAPTER 3 THATS LOGARITHSMS....HELPE PLZZZ ASAP!!!:)
I'm sorry i'm very short of time. I tried to solve only question 6 and 10 (a) since you need solutions very quickly.
I would request u to post again the values for numbers 7 and 8 because the powers are not well visible.
See attached file and if i've got the wrong answer, please do tell me, i'll go through it again.
For question 10, follow the same steps for the other parts.
 

Attachments

  • 6 n 10a.doc
    20 KB · Views: 7
Messages
2,211
Reaction score
1,261
Points
173
Show that the points (7,12), (-3,-12) and (14,-5) lie on a circle with centre (2,0).

help please :)
 
Messages
803
Reaction score
1,287
Points
153
Show that the points (7,12), (-3,-12) and (14,-5) lie on a circle with centre (2,0).

help please :)


points lieing on a circle means the distance from the centre to these points will be same.
check that out prove that out.(y)
 
Messages
1,476
Reaction score
1,893
Points
173
can someone who is a genius or knows this help me out...m stuck!!!!PURE MATHEMATICS 2 and 3 a LEVELS!!!!PLZZZ ATTACH A SCAN IF POSSIBLE.....PLZZZZZZZZZZZZZZZZZZ......YA YOU!!!:)
All these questions have the same logic:

Q4 : Put the expression for Sn and equate it to 3 million in question4



As for the other questions, show me your working , i will pinpoint the mistake, its lengthy and i dont have a scanner !
 
Messages
1,476
Reaction score
1,893
Points
173
Show that the points (7,12), (-3,-12) and (14,-5) lie on a circle with centre (2,0).

help please :)
If the three points lie on the circumference of a circle there distances from the centre (2,0) must be same [RADIUS ]

Find the distance b/w (7,12) and (2,0)

Find the distance b/w (-3,-12) and (2,0)

Find the distance b/w (14,-5) and (2,0)

These three distances must be same!
 
Messages
398
Reaction score
685
Points
103
O is the center of the sector OAB. CD is another arc, with center O and radius r cm. DB = 2cm. If the area of ABDC is one-third the area of the sector OCD find the value of r ?
I don't know how to answer this , so could u help ? :)
 
Messages
1,882
Reaction score
1,331
Points
173
O is the center of the sector OAB. CD is another arc, with center O and radius r cm. DB = 2cm. If the area of ABDC is one-third the area of the sector OCD find the value of r ?
I don't know how to answer this , so could u help ? :)
I replied in the conversation but assuming you didn't get it, i'm doing it here again :)
http://www.mediafire.com/?sd06xlzb4x2tcft <= This was the plan diagram i made.
Now for the solution!
The area of OCD = 1/2 * r^2 * theta
The area of OAB = 1/2 * (r + 2)^2 * theta
So,
area of ABDC = 1/2 * (4r + 4) * theta
Now if you equate area of ABDC to 1/3 area of OCD
you'll get
r^2 - 12r - 12 = 0
and the answer the calculator gives after solving is 12.93
:)
 
Messages
32
Reaction score
24
Points
8
hey guys plz help me in this question.
 

Attachments

  • 2012-07-21_10-02_w02_qp_3.pdf.jpg
    2012-07-21_10-02_w02_qp_3.pdf.jpg
    24.4 KB · Views: 8
Messages
398
Reaction score
685
Points
103
I replied in the conversation but assuming you didn't get it, i'm doing it here again :)
http://www.mediafire.com/?sd06xlzb4x2tcft <= This was the plan diagram i made.
Now for the solution!​
The area of OCD = 1/2 * r^2 * theta​
The area of OAB = 1/2 * (r + 2)^2 * theta​
So,​
area of ABDC = 1/2 * (4r + 4) * theta​
Now if you equate area of ABDC to 1/3 area of OCD​
you'll get​
r^2 - 12r - 12 = 0​
and the answer the calculator gives after solving is 12.93​
:)

I didn't see it , Thank you a lot . really appreciate your help :)
 
Top