a
b
c
d
e
f
g
1
r = 2
r = 0.5
Not geometric
r = 0.8
r = w
r = √3
r = -3
2
160, 320
1.25, 0.625
Not geometric
40.96, 32.768

w5, w6

9, 9√3
243, -729
3
1024
0.5625
8192
47.59 (4s.f.)
0.00390625
1397.5
1048576z21
4
2n
3n
q x 3n − 1
6 x (-1)n-1

5. r = 2, a = 0.5 and the sequence is 0.5, 1, 2 ,4, ...

6.r = 1/3, a = 27 and the sequence is 27, 9, 3, 1, ...

7. 768 is the 8th term.

8. 4096 is the 7th term.

9. He would be doing 32 768 press-up and probably be very fit... or dead!