SOLUTION: A CLIMBER ASCENDS 500 FT ON THE 1ST HOUR. AND 10 FT LESS IN EACH SUCCEEDING HOURS WHEN WILL HE BE 3720 ABOVE HIS STARTING POINT

Question 949915: A CLIMBER ASCENDS 500 FT ON THE 1ST HOUR. AND 10 FT LESS IN EACH SUCCEEDING HOURS WHEN WILL HE BE 3720 ABOVE HIS STARTING POINT
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of hours passed
You are summing:
for n = 1,2,3,4, ...
This numerical sequence =
For instance, say

check it -it works
---------------------
Now I can say:

( makes sense to use -sqrt )
( rounded off )

check:

OK

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