Answer:
Step-by-step explanation:
The principal, real, root of:

= 0.164316767
All roots:
0.164316767
−0.164316767
0.027 is not a perfect square
You can notice that each term of the sequence has a denominator with powers of 2. The first term has 2 powered to 0, the second term has a 2 powered to 1 and so on. The numerator is always 3.
Then, for the n-th term, you have:
12 is the answer
12 goes into all threee
1.4km 1000 meters is equal to 1 kilometer