What is the recursive rule for this geometric sequence?

1/2,−2,8,−32,...

a1=−12;an=4⋅an−1

a1=12;an=2⋅an−1

a1=12;an=−4⋅an−1

a1=−4;an=12⋅an−1

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

1. perpendicular

2. parallel

3. perpendicular