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October 31, 2025, 10:18:32 pm
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Author Topic: What do these bracket things mean?  (Read 630 times)  Share 

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JackSonSmith

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What do these bracket things mean?
« on: January 15, 2015, 09:53:33 pm »
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Could someone please explain what the number on top of number inside the bracket means. Thank-you.

(find image attached)
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Conic

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Re: What do these bracket things mean?
« Reply #1 on: January 15, 2015, 10:01:18 pm »
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is the the number of r-combinations of n objects. You may have seen nCr or C(n,r) notation used in 1/2 methods. There is a formula for evaluating these:



where n! is the factorial of n.
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2012-13: VCE at Parade College (Chemistry, English, Mathematical Methods, Physics and Specialist Mathematics).
2014-16: Bachelor of Science at La Trobe University (Mathematics and Statistics).
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