Answer:
1. 192
2. 2/729
3. 1/64
Step-by-step explanation:
1. r = 2, a1 = 3, n = 7
3(2)^7-1
3(2)^6
3(64)
192
2. r = 1/3, a1 = 18, n = 9
18(1/3)^9-1
18(1/3)^8
18(1/6561)
2/729
3. r = 1/2, a1 = 1, n = 7
1(1/2)^7-1
1(1/2)^6
1(1/64)
1/64
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Answers & Comments
Answer:
1. 192
2. 2/729
3. 1/64
Step-by-step explanation:
1. r = 2, a1 = 3, n = 7
3(2)^7-1
3(2)^6
3(64)
192
2. r = 1/3, a1 = 18, n = 9
18(1/3)^9-1
18(1/3)^8
18(1/6561)
2/729
3. r = 1/2, a1 = 1, n = 7
1(1/2)^7-1
1(1/2)^6
1(1/64)
1/64