Re: Typo, I hope.

On Oct 18, 6:30 pm, quasi <qu...@xxxxxxxx> wrote:
On Thu, 18 Oct 2007 18:10:07 -0700, "achsofr...@xxxxxxxxx"

<dkw12...@xxxxxxxxx> wrote:
My daughter is taking prealgebra and one problem...different from all
the others shows a sequence of 25, 44, 53, 62...and asks for the 12th
term. My daughter had 19n + 6 = t, and that looks right, but only for
the first two terms. Then the sequence seems to be 9n+35. This was
likely a typo since every other problem on the work*** and the
example showed consistent increases with simple relationships...unless
I am missing something. Is there just one formula to describe the
above sequence or is it likely a mistake? Now I don't really know what
to do since the 12th term using 9n+35 is different from using 19n+6.
Any ideas? Thanks, dkw

Yes, given the context (prealgebra, linear expressions), it
essentially a certainty that it's a typo, just as you expected.

Thus, assume the first term should have been 35, not 25.

The formula 9n + 35 then works perfectly, but be careful -- the first
term uses n = 0, so you need to use n = 11, not n = 12, to get the
12th term.

quasi

Thanks. In the example though, the first term was the first number and
it was called 1, so I think you just plug in the nth term, not
n-1...at least for this work***. dkw

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