Today we continued our focus on arithmetic sequences. We proved that sequences were arithmetic by showing that for any 2 consecutive terms, tn and tn+1 , their difference was a real number. (See the first 3 slides)
Then we discussed the three ways to find the nth term of a sequence:
1) Write out all previous terms
2) Find the explicit definition (formula) and substitute (slide 4)
3) How many jumps? (slides 5,6)
Then Mr. A. gave us a problem about a geometric sequence (what’s that?) to try at home. Slide 7 was supposed to be that problem but the slide shows a different problem. The problem that we were to try was the following:
{-2, 6, -18, 54, …} is a geometric sequence.
a) Find the next term
b) Find the 10th term.
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The homework on the board was: Read pgs. 473-476, problems pg. 476 1-9 odd, 17-41 odd.
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