Page 20 - 新思维数学活动用书6 样章

2.1 Counting and sequences

Exercise 2.1

Focus

1 Here is a rocket made of seven shapes.

Magda draws a sequence using the rockets.

1 2 3

She records information about the sequence in a table.

Position 1 2 3

Term
(number of shapes) 28

a Complete the table.
b What is the term-to-term rule for the sequence?

c What is the position-to-term rule for the sequence?

d What is the 25th term in the sequence?

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