Answer:
Both
Explanation:
In a geometric sequence, the ratio between successive terms is constant. This means that we can move from any term to the next one by multiplying by a constant value. Let's calculate this ratio over the first few terms:
12.5/25 = 25/50 โ = 50/100 = 1/2
We see that the constant ratio between successive terms is 1/2
โ
Both Rakesh and Tessa got a correct explicit formula.
I did this khan academy and it takes forever to type all of the steps but its both of them.