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tosophiechen

Oct 20, 2017

In Solve Me if You can!

Another problem is on congruency of triangles to challenge the motivated students in plane geometry.

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tosophiechen

Jul 08, 2017

In Challenges Wanted!

How to ask for help on Mathematics via forum? Specific questions OUTSIDE of Harry's Education Center's homework The questions presented must include the level, source (i.e. school or textbook name etc.) and year + have the question either typed up or attach as an image. For Example: If your question was taken from James Ruse's 2011 Term 2 maths Ext. 1 year 12 exam paper question 7 (a) sub-question (iii) Thread Title: Ex1 - JamesRuse - Year 12 Term 2 - 2011 - Q7 (a)/(iii) If the question was taken from a hardcopy, simply take a picture on the specific question area and upload on forum. If the question was taken from a digital copy, please follow the listed steps below to upload question as a image in the thread. Step 1: Press <Fn> + <Insert PrtScr> buttons together to get a screenshot of the question. Step 2: Select and open Paint program Step 3: Press <Ctrl> + <V> buttons to paste the screen shot of the question Step 4: Select the question area, then press <crop> to cut off the remainder Step 5: Save the file as png or jpg image file Step 6: Click on the camera icon below to upload the question as a image file. How the question posted will be answered? It is in our best interest that our replies will help you to learn effectively. Our tutors will review the question posted and provide necessary hints so that you can at least try to complete the remainder by yourself. Or if not, please at least post with your attempt before asking again for additional help. How do I get to know if the question has been answered? You will get a notification once your thread has been answered. Please give us a heart if you find the hint provided is helpful. :) GENERAL RULES: Be Descriptive and DO NOT use stupid topic names No spam/advertising/self-promote in the forums No 'offensive' post, links or images Do not PM members asking for help Remain respectful to other members at all times Please be aware that this is a new initiative from Harry's Education Center to offer additional online help outside of our weekly tutorial classes. Please be patient and report any bugs (under Technical Support category) or give us any feedback for improvement. We hope you enjoy and find it useful.

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tosophiechen

May 04, 2017

In Challenges Wanted!

This question was presented by Johnny from our Ext. 2 maths class (2017) via wechat! : ) Use the method of slicing to find the volume of the solid obtained by rotating the region.

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tosophiechen

May 04, 2017

In Solve Me if You can!

Suppose that we are told that four numbers a,b,c,d lie between -5 and 5. Suppose also that the numbers are constrained so that
5 < a+b < 10 and -10 < c+d < -5 Given this information, what can you deduce about these inequalities?
?? < a+b-c-d < ?? ?? < a-c < ?? ?? < a-c+d-b < ?? ?? < abcd < ?? Did you know ... ?
There are many useful general inequalities in mathematics, such as the AM-GM, Cauchy-Schwarz and Jensen's inequalities. These general inequalities are powerful tools which greatly simplify a wide variety of problems in mathematics, in applications from integration to probability via linear algebra.

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tosophiechen

May 04, 2017

In Solve Me if You can!

Find a solution to this equation to 1 dp. Are there any others? Did you know ... ?
Numerical solution of equations forms an important part of real-world mathematics and mathematics applied to science, where equations are often too complex to be solved exactly. Mathematicians have developed many advanced techniques for the numerical solution and exploration of equations.

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tosophiechen

May 04, 2017

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