Mr. Lai’s Math Blog

student tutorials on math contest questions

2001 Question #23 (by Chris C., Jimmy L.)

Posted by elai on October 20, 2008




5 Responses to “2001 Question #23 (by Chris C., Jimmy L.)”

  1.   James Anderson Says:

    The video was very smooth, and it was pretty easy to understand where you guys were going. The only real criticism I have is that the video went a bit too fast around the middle part. When you guys were substituting the equations, I had to pause the video and see what happened.

    But other than that, great job.

  2.   pate Says:

    you just a good job, video was clear but could have been funnier, didn’t understand end though please explain.

  3.   Jimmy Lou Says:

    Which specific part of the end do you not understand? The solution? The adding part…? How we came up with the numbers? Could you clarify on that please?

  4.   Jeff Cho Says:

    It was a good video overall, although in the “a little harder” section how do we know that tk=24-5t(k-1) is equal to tn=24-5t(n-1)? I don’t think you’ve stated exactly how k=n. And also, how do we know that p, q and r are constants automatically? Other than that, nice video.

  5.   Jimmy Lou Says:

    Thanks for the comment,
    For the first question, we know that k = n because n is the number representing the sequence and k is also the number representing the sequence.
    For your second question, I believe if you read the question again you will see “…where p,q,r are constants….” That tells you automatically that p,q,r are constants.

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