Question

Exercise 21.2
1 For each of the following sequences:
i) describe the term-to-term rule
ii) write down the next two terms of the sequence
iii) calculate the 10th term.
a 3, 6, 9, 12, 15
i)
ii)
iii)
b 5, 7, 9, 11, 13
i)
i)
ii)
iii)
c 1, 7, 13, 19, 25
i)
ii)
iii)
d 20, 15, 10, 5,0
i)
i)
ii)
iii)

Answer 1

Răspuns:

a 3, 6 , 9 , 12 , 15

i) din 3 în 3

ii) 18 , 21

iii) 30

b 5 , 7 , 9 , 11 , 13

i) din 2 în 2

ii) 15 , 17

iii) 23

c 1 , 7 , 13 , 19 , 25

i ) din 6 în 6

ii) 31 , 37

iii) 55

d