What is the explicit formula for this sequence?

Option B is correct.

Step-by-step explanation:

Given Sequence is:

4 , -8 , 16 , -32 , ...

To find: Explicit formula for the sequence.

From give sequence,

Option A :

of the sequence does not matches with the of the formula.

Thus, This option is incorrect.

Option B :

of the sequence matches with the of the formula.

Thus, This option is correct.

Option C :

of the sequence does not matches with the of the formula.

Thus, This option is incorrect.

Option D :

of the sequence does not matches with the of the formula.

Thus, This option is incorrect.

Therefore, Option B is correct.

..

step-by-step explanation:

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24