Ex2D(WS)(1-5)

[冇地位的我]

1.a The 1st terms: The 2nd terms: The 3rd terms:
4n 3x1=7 4n 3x2=11 4n 3x3=15
1.b The 1st terms: The 2nd terms: The 3rd terms:
10-2nx1=8 10-2nx2=6 10-2nx3=4
1.c The 1st terms: The 2nd terms: The 3rd terms:
n(n 2)x1=3 n(n 2)x2=8 b(n 2)x3=15
1.d The 1st terms: the 2nd terms: The 3rd terms:
n/n 1x1=1/2 n/n 1x2=2/3 n/n 1x3=3/4
2.a The 5th terms:
15
2.b An algebraic expression to represent the nth term of the sequence is:
3n
3.a The 5th terms:
1/6
3.b An algebraic expression to represent the nth term of the sequence is:
1/n 1
3.c The 10th terms:
1/n 1x10=1/11
4.a The 6th terms:
11
4.b An algebraic expression to represent the nth term of the sequence is:
n 5
4.c The 10th terms:
n 5x10=14
5.a An algebraic expression to represent the nth term of the sequence is:
3n-1
5.b The 8th terms:
3n-1x8=23
(以上答案只作參考,如有錯誤,本人不會負責)