Math Question

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lkoechig

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Dec 18, 2005
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I am in need of an emergency answer to a math question. I am hoping you might be able to help me.

The sum of three consecutive odd integers is five less then twice the smallest of those integers.

Find the smallest of these integers and find the greatest of these integers.


If you can help it would be greatly appreciated. Thank you
 
lkoechig said:
I am in need of an emergency answer to a math question. I am hoping you might be able to help me.

The sum of three consecutive odd integers is five less then twice the smallest of those integers.

Find the smallest of these integers and find the greatest of these integers.
Click to expand...
Name the integers. A popular choice might be, X, X+2, and X+4. That MAY be an inadequate definition, since we really don't know if htey are odd or even. I'll inclined to try it, just to see what falls out.

"The sum of three consecutive odd integers"

X + (X+2) + (X+4)

"five less then twice the smallest"

2*X - 5

So...

X + (X+2) + (X+4) = 2*X - 5

Can you solve for X, the smallest of the integers? Is it odd? Given that, can you find the greatest of the set?
 
I thought I would work through the problem on video for you. If you follow the link you'll find my solution step-by-step. I stronly suggest pausing it, working ahead, then checking your solution against mine.

http://www.zippyvideos.com/6054492792741966/consecutive_odd_int_12-18-05/

I'm having fun with this video setup :) It's easier to make a quick video of a solution to a problem than it is to have a lenghty discussion and use latex. :) The video is 8.34MB so if you are on a slow connection it may take a few minutes to start streaming.
 
lkoechig said:
I am in need of an emergency answer to a math question. I am hoping you might be able to help me.
The sum of three consecutive odd integers is five less then twice the smallest of those integers.
Find the smallest of these integers and find the greatest of these integers.
If you can help it would be greatly appreciated. Thank you
Click to expand...

Ok, now that TK showed you how, try this one (quite similar):

The sum of three consecutive odd integers is one less than four times the smallest of those integers.
Find the smallest of these integers and find the greatest of these integers.

And Mr OpticalTempest, not sure what you're doing:
are you innocently trying to sell something?
 
Not selling anything...

I work as a tutor at my college and I think doing this will help me improve my math skills and tutoring techniques. I want to become a mathematician and I hear the
best way to learn the subject is to teach it.

I have no intention of charging people or luring people in to pay me as a tutor by doing this. So far, I have gotten quite a few positive responses from others.

With the setup I have -- it's just as easy for me to record myself writing on paper, and upload it to a free video hosting site than it is type out a detailed solution using latex. I hope others give it a try. It's really simple to do!

I'm using a cheap quickcam 4000 to capture 640x480 AVI video clips. Once I have the clip it takes me about 2 minutes to convert it to a .WMV clip using Windows Media Encoder (free) or Windows Movie Maker (free) on Windows XP (arm and a leg). Once that is done, I upload it to a free video hosting site such as putfile.com or zippyvideos.com.

It's fun being able to help people... Especially when I am bored and have nothing
better to do.
 
opticaltempest said:
I thought I would work through the problem on video for you. If you follow the link you'll find my solution step-by-step. I stronly suggest pausing it, working ahead, then checking your solution against mine.

http://www.zippyvideos.com/6054492792741966/consecutive_odd_int_12-18-05/

I'm having fun with this video setup :) It's easier to make a quick video of a solution to a problem than it is to have a lenghty discussion and use latex. :) The video is 8.34MB so if you are on a slow connection it may take a few minutes to start streaming.
Click to expand...

You're doing a great job! Please keep it up! :wink:
 
hey happy, how come you're suddenly in favor of someone
giving a student a full solution :?: :shock:
 
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