ทายสิลำดับนี้มีกี่พจน์ Question Preview (ID: 50833)


หาจำนวนพจน์ของลำดับเลขคณิต. TEACHERS: click here for quick copy question ID numbers.

1, 2, 3, … , 20
a) 20
b) 19
c) 21
d) 18

1, 3, 5, …, 29
a) 15
b) 29
c) 30
d) 16

2, 4, 6, …, 50
a) 25
b) 26
c) 50
d) 49

1, 5, 9, …, 41
a) 11
b) 10
c) 41
d) 40

5, 10, 15, … , 155
a) 31
b) 32
c) 33
d) 34

100, 98, 96, … , 60
a) 21
b) 20
c) 22
d) 24

50, 47, 44, … , 23
a) 10
b) 11
c) 12
d) 13

0, -10, -20, … , -400
a) 41
b) 40
c) 42
d) 43

0.3, 0.6, 0.9, ..., 4.8
a) 16
b) 13
c) 14
d) 15

1.1, 2.2, 3.3, ..., 24.2
a) 22
b) 23
c) 24
d) 21

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