Asked by Angelina
find the explicit formula.
1. 0.5, -1, 2, -4 ...
2. 5, -5/3, 5/9, -5/27 ...
3. 1.25, 5, 20, 80 ....
4. -4, -24, -144, -864 ...
5. 4, 12, 36, 108 ...
6. 3, -15, 75, -375 ...
7. 2, 4, 8, 16 ...
8. 3/2, 3/4, 3/8, 3/16 ...
9. -1, -6, -36, -216 ...
10. 3, 12, 48, 192 ...
1. 0.5, -1, 2, -4 ...
2. 5, -5/3, 5/9, -5/27 ...
3. 1.25, 5, 20, 80 ....
4. -4, -24, -144, -864 ...
5. 4, 12, 36, 108 ...
6. 3, -15, 75, -375 ...
7. 2, 4, 8, 16 ...
8. 3/2, 3/4, 3/8, 3/16 ...
9. -1, -6, -36, -216 ...
10. 3, 12, 48, 192 ...
Answers
Answered by
Damon
1. geometric series
a r^(n-1)
a = .5, r = -2
.5 *(-2)^(n-1)
2. same deal
5 *(-1/3)^n-1
and on and on .....
a r^(n-1)
a = .5, r = -2
.5 *(-2)^(n-1)
2. same deal
5 *(-1/3)^n-1
and on and on .....
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