E-maths help - Singapore Forums by SGClub.com
Singapore Forums by SGClub.com
Sitemap Contact Us FAQ Singapore Forums by SGClub.com
Home Photos Member List Register Mark Forums Read  
Go Back Home > Lifestyle > School Life > Math Help » E-maths help

Why aren't you a member of SGClub.com yet??

» Join 130,000+ other members in chatting.
» Make lots of new friends here.
» Keep up-to-date with current events.
» Participate in Club outings.
» Download lots of Free Stuff!

Registration just takes 2mins and is absolutely free so join our community today!

I Want to Choose my Own Personal Nickname Now!


Reply
 
LinkBack Thread Tools Display Modes
Old 4th January 2013, 08:56 PM   #1 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

E-maths help

Im not very good with my indices, and my math teacher just had to give 100 questions on indices and expects it to be done over the weekends ... Im stuck with this


(3xy^-3)^2 ÷ (2x^-4 y^3)^2 ...

Im getting answers like 9/4x^3 but Im guessing it's probably wrong

Sponsors:
Stewdunt is offline  
Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 09:08 PM   #2 (permalink)
Vampire Lover ﺕ
SkyedAngel is just really niceSkyedAngel is just really niceSkyedAngel is just really nice

 
SkyedAngel's Avatar
 
Posts: 3,420
Join Date: Nov 2010
Likes: 399
Liked 168 Times in 141 Posts
Gender:

Re: E-maths help

I got:

9x^2y^-6 x 1/4x^-8y^6

= 9x^10/4y^12


o_O

SkyedAngel is offline   Add to SkyedAngel's Reputation Reply With Quote
Old 4th January 2013, 09:10 PM   #3 (permalink)
Vampire Lover ﺕ
SkyedAngel is just really niceSkyedAngel is just really niceSkyedAngel is just really nice

 
SkyedAngel's Avatar
 
Posts: 3,420
Join Date: Nov 2010
Likes: 399
Liked 168 Times in 141 Posts
Gender:

Re: E-maths help

I actually like indices alot. One of my favourite topics. But it's very easy to be careless in indices, because of all the power signs.

SkyedAngel is offline   Add to SkyedAngel's Reputation Reply With Quote
Old 4th January 2013, 09:12 PM   #4 (permalink)
Hyomin Ö
Eclipse. is on a distinguished road

 
Eclipse.'s Avatar
 
Posts: 42
Join Date: Jan 2013
Likes: 1
Thanked 1 Time in 1 Post
Gender:


(3xy^-3)^2/(2x^-4y^3)^2 =
(9x^2y^-6)/(4x^-8y^6) =
(9/4)x^10y^-12

Sent from my LG-P880 using Tapatalk 2

Eclipse. is offline   Add to Eclipse.'s Reputation Reply With Quote
Old 4th January 2013, 09:27 PM   #5 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

I found the correct answer ... it's 36/x^6

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 09:28 PM   #6 (permalink)
Vampire Lover ﺕ
SkyedAngel is just really niceSkyedAngel is just really niceSkyedAngel is just really nice

 
SkyedAngel's Avatar
 
Posts: 3,420
Join Date: Nov 2010
Likes: 399
Liked 168 Times in 141 Posts
Gender:

Re: E-maths help

Originally Posted by Stewdunt View Post
I found the correct answer ... it's 36/x^6
Uhhh... I don't think soo... But I may be wrong so.

SkyedAngel is offline   Add to SkyedAngel's Reputation Reply With Quote
Old 4th January 2013, 09:31 PM   #7 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

Originally Posted by SkyedAngel View Post
Uhhh... I don't think soo... But I may be wrong so.
From the original equation :
9x^2 y^-6 ÷ 1/4x^-8y^6
= 36x^-6
= 36/x^6

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 09:35 PM   #8 (permalink)
Vampire Lover ﺕ
SkyedAngel is just really niceSkyedAngel is just really niceSkyedAngel is just really nice

 
SkyedAngel's Avatar
 
Posts: 3,420
Join Date: Nov 2010
Likes: 399
Liked 168 Times in 141 Posts
Gender:

Re: E-maths help

Originally Posted by Stewdunt View Post
From the original equation :
9x^2 y^-6 ÷ 1/4x^-8y^6
= 36x^-6
= 36/x^6
According to what you typed, there's something really wrong with your concept!

Wait.

EDIT: You can't just decide to move the 4 into the denominator without changing the divide sign!
EDIT AGAIN: X^2 divided by 1/x^-8 (which btw is not the same as what your original equation is) is what you gave the answer as, but your original manipulation is wrong.


Last edited by SkyedAngel; 4th January 2013 at 09:38 PM.
SkyedAngel is offline   Add to SkyedAngel's Reputation Reply With Quote
Old 4th January 2013, 09:38 PM   #9 (permalink)
Honesty is a virtue~
Tetrahedron is a jewel in the roughTetrahedron is a jewel in the rough

 
Tetrahedron's Avatar
 
Posts: 1,519
Join Date: Sep 2010
Likes: 16
Liked 156 Times in 111 Posts
Gender:

Re: E-maths help

There is something wrong with the answer. Just saying.

SkyedAngel got the correct answer.

@Stewdunt Mind if you share you working? I may be able to spot the error.

__________________
Currently just a wanderer...
Tetrahedron is offline   Add to Tetrahedron's Reputation Reply With Quote
Old 4th January 2013, 09:53 PM   #10 (permalink)
★ ☆ ★ ☆ ★ ☆ ★ ☆ ★
EightyOne is a glorious beacon of lightEightyOne is a glorious beacon of lightEightyOne is a glorious beacon of lightEightyOne is a glorious beacon of light

 
EightyOne's Avatar
 
Posts: 4,717
Join Date: May 2012
Likes: 261
Liked 293 Times in 260 Posts
Gender:

Re: E-maths help

Wah so hard. I don't know how do sia.

EightyOne is offline   Add to EightyOne's Reputation Reply With Quote
Old 4th January 2013, 09:56 PM   #11 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

first line is the original equation

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 10:09 PM   #12 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

I think you guys may have misinterpreted the original equation because it looked really messy from here

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 10:17 PM   #13 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

I think I am correct right?

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 10:30 PM   #14 (permalink)
Cool SGClubber
Unknownguy is on a distinguished road

 
Posts: 30
Join Date: Nov 2012
Likes: 0
Thanked 1 Time in 1 Post
Gender:

Re: E-maths help

Stewdunt, SkyedAngle got the correct answer. I was confused at first about your question until you post the image of the equation then i know how to do. So, in other words, your answer is not correct and SkyedAngle is correct. Now do you know your mistake?

Unknownguy is offline   Add to Unknownguy's Reputation Reply With Quote
Old 4th January 2013, 10:36 PM   #15 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

Originally Posted by Unknownguy View Post
Stewdunt, SkyedAngle got the correct answer. I was confused at first about your question until you post the image of the equation then i know how to do. So, in other words, your answer is not correct and SkyedAngle is correct. Now do you know your mistake?
no I still don't ? can you see my workings and find anything wrong ?
I checked with my peers and they said it was the same as mine ... Maybe post your workings?

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 10:42 PM   #16 (permalink)
Hyomin Ö
Eclipse. is on a distinguished road

 
Eclipse.'s Avatar
 
Posts: 42
Join Date: Jan 2013
Likes: 1
Thanked 1 Time in 1 Post
Gender:




Sent from my LG-P880 using Tapatalk 2

Eclipse. is offline   Add to Eclipse.'s Reputation Reply With Quote
Old 4th January 2013, 11:05 PM   #17 (permalink)
Cool SGClubber
imagel is on a distinguished road

 
Posts: 206
Join Date: May 2010
Likes: 3
Liked 10 Times in 10 Posts
Gender:

Re: E-maths help



So technically everyone is right!

imagel is offline   Add to imagel's Reputation Reply With Quote
Old 4th January 2013, 11:08 PM   #18 (permalink)
New SGClubber
Stewdunt is on a distinguished road

 
Posts: 23
Join Date: Jan 2013
Likes: 0
Liked 0 Times in 0 Posts
Gender:

Re: E-maths help

omg you're right ... I forgot to mention to you guys ^-2 ... No wonder ... So Im correct right ?

Stewdunt is offline   Add to Stewdunt's Reputation Reply With Quote
Old 4th January 2013, 11:11 PM   #19 (permalink)
Cool SGClubber
Unknownguy is on a distinguished road

 
Posts: 30
Join Date: Nov 2012
Likes: 0
Thanked 1 Time in 1 Post
Gender:

Re: E-maths help

Eclipse's working is correct. At first Stewdunt, your working was correct.

Unknownguy is offline   Add to Unknownguy's Reputation Reply With Quote
Old 4th January 2013, 11:13 PM   #20 (permalink)
Cool SGClubber
Unknownguy is on a distinguished road

 
Posts: 30
Join Date: Nov 2012
Likes: 0
Thanked 1 Time in 1 Post
Gender:

Re: E-maths help

I really don't know how to explain but you need to know the law of indices very well so then you can apply the method to the indices question.

Unknownguy is offline   Add to Unknownguy's Reputation Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
A level JC H2 maths e book vols for sale on my maths site whitecorp Tuition Services & Educational Supplies 3 6th April 2012 09:37 AM
JC H2 Maths, O level A and E Maths, IP and IB Maths Tuition khotl73 Tuition Services & Educational Supplies 0 1st March 2012 01:40 PM
MATHS SPECIALIST - Score 'A' in Maths in the Shortest Time Effortlessly! filomaths Tuition Services & Educational Supplies 0 25th January 2012 01:34 PM
Creating a no nonsense H2 maths bridging portal (for those who did not take A maths in sec school) whitecorp Math Help 0 13th December 2010 12:53 AM
Primary (Eng-Maths-Science) / Secondary (E-Maths/A-Maths/Sci/Chem) / JC Economics Tuition Available tuitiongenius Jobs & Services 0 5th December 2008 12:37 PM

» Sponsors
Watch Free Movies Online
Celebrity Gossip
Food Delivery

» Facebook Fans
» What's Going On?
Title, Username, & Date
Repost comment.
[Maid abuse] Singapore is a very evil and lawless country. There is broad daylight i
Stupid court of appeal gives red light running driver who hit pedestrian 15% discount
Mum's Kitchen Catering and Cherish Delights get licences suspended after nearly 40 people...
[PMD-pedestrian rules] Singapore Court judges are high handed and biased or court rep
Post anything random on this thread.
Ritter Sport chocolate recalled due to undeclared allergen
Aoki Hagane no Arpeggio: Ars Nova
I really hate my mother!!!
Transcend RDF9K2 All-in-One Card Reader
Transcend ESD250C, a portable SSD that’s super classy
How PAP exploited racial differences to impose FASCIST rule over Singapore.
Up to S$7250 of government $ misused for buying each vote in Singapore?
Funky Fields organic vegan spreadable recalled due to 'undisclosed allergen'
100 hawksbill turtles released into the sea after rare hatching on Sentosa
Inspirational Songs
MOH, SFA investigating after 18 typhoid fever cases in 3 weeks
By militarily invading Hong Kong, Xi Jingping is setting in motion, the wheels of nuc
Deng XiaoPing original vision for HKG- China reunification was for the two to unite a
HSA warns against three products
Featured Photos
by marisoljames322
· · ·
Member Galleries
20359 photos
13619 comments
by marisoljames322
· · ·
Member Galleries
20359 photos
13619 comments
by pdsubbu
· · ·
Member Galleries
20359 photos
13619 comments
by Vikas Dhar
· · ·
Photography
35 photos
36 comments
by aaudreygan
· · ·
Guy Photos
1581 photos
946 comments
by aaudreygan
· · ·
Girl Photos
4351 photos
28608 comments
by a8paris
· · ·
Guy Photos
1581 photos
946 comments
by a8paris
· · ·
Guy Photos
1581 photos
946 comments
by aaricia
· · ·
Girl Photos
4351 photos
28608 comments
by aaricia
· · ·
Girl Photos
4351 photos
28608 comments

 

All times are GMT +8. The time now is 05:55 PM.


Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright© 2004-2013 SGClub.com. All rights reserved.