2 as a baseline then add 2.40 for first mile which then comes up to 4.40. 4.40 plus 1.40 = 5.80 plus 1.40 = 7.20 plus 1.40 = 8.60 plus 1.40 = 10. then we count the amount of 1.40's we added which was 4. and then we account for the first mile so there we have 5 miles
Let's analyze the sequence: {2,3,5,9,17...}. 3 = 2+1 5 = 3+2 9=5+4 17=9+8 So, every element of the sequence is obtained as sum from the previous element + (previous element -1)