Page 12 - Practicum 5_Buku Digital Flip pdf_Grace Margareth_Arithmetic Sequence and Series Grade XI
P. 12
Mathematics Teaching Material Sequence and Series Grade XI
− 5 = −2
Answer: C
4 Given: Sequences 1, 4, 7, 10, …
= +
Asked: 10 = ⋯ ?
Answer :
Determine :
= 1
1
+ = 1 … (1)
= 4 20
2
2 + = 4 … (2)
With SPLDV obtained a = 3 and b = -2 , so that:
= 3 − 2
10 = 3(10) − 2
= 30 − 2
= 28
Answer: B
5 Known: Sequences 44, 41, 38, 35, 32 …
Asked: = ⋯ ?
Answer :
From the above sequence, we get a = 44; b = -3 so that:
= + ( − 1) 20
= 44 + ( − 1)(−3)
= 44 − 3 + 3
= 47 − 3
Answer: E
Total Score 100
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11
