What is the fourth term of the sequence? a1 = m an = 2an-1

Fourth term of the sequence is 8m

Step-by-step explanation:

Given: Sequence

We have to find the fourth term of the given sequence.

Consider the given sequence

Forth term will be ....(1)

We find third term first

...(2)

Also, given

and .....(3)

Put (3) in (2), we get,

...(4)

Put (4) in (1) , we get,

Thus, Fourth term of the sequence is 8m

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

correct answer:

b.(19,-2)