[填空题]
On Wednesday Eddy goes to a veli*rz h.+ umj2 j2 dhnlx8iwr+th(5dd(odrome to t2o j42uh0hj 8elqopvv j7we19rain. He cycles the first lap of the track in 25 seconds. Each la 8 we0u jovj29p2jhvh1lo4eq7 p Eddy cycles takes him
1. 6 seconds longer than the previous lap.
1.Find the time, in seconds, Eddy takes to cycle his tenth lap.
$u_{10}$= seconds.
Eddy cycles his last lap in 55.4 seconds.
2.Find how many laps he has cycled on Wednesday.
n= laps.
3.Find the total time, in minutes, cycled by Eddy on Wednesday.
$S_{20}$= minutes.
On Friday Eddy brings his friend Mario to train. They both cycled the first lap of the track in 25 seconds. Each lap Mario cycles takes him 1.05 times as long as his previous lap.
4.Find the time, in seconds, Mario takes to cycle his fifth lap.
$v_5$≈ seconds.
5.Find the total time, in minutes, Mario takes to cycle his first ten laps.
$S_{10}$≈ minutes
Each lap Eddy cycles again takes him 1.6 seconds longer that his previous lap.
After a certain number of laps Eddy takes less time per lap than Mario.
6.Find the number of the lap when this happens.
n= th lap
