Page 19 - 新思维数学活动用书6 样章

2 Numbers and sequences

2.1 Counting and sequences

Worked example 1
position-to-term rule
Write a sequence of five terms with steps term term-to-term rule
of constant size that has first term 1 and

2
second term 1 .
3

2
1
1, 1 , 2 , 3, 3 2
3 3 3
2
The step size is the difference between the 1st and 2nd terms. It is .
3
You could use a number line to help you with the count.

1 1 1 1 2 2 2 1 2 2 3 3 1 3 2 4
3
3
3
3
3
3

18
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