Traditional Culture Encyclopedia - Photography and portraiture - mathematical problem
mathematical problem
Solution:
If calculated by formula,
Let's say that the time for the car to travel to school is X and the number of stops is Y. Because it stops for one minute at a time, Y is an integer.
3000+250X=750(X-Y)
Y = x divided by 4, (x- 1) divided by 4, (x-2) divided by 4, and (X-3) divided by 4.
And y is an integer.
Solve all x's of four formulas and check them one by one. What meets the conditions is the answer.
Because y is an integer, after solving x, put x into the formula of y to test.
For example, when x = 9
(9- 1) divided by 4 = 2
None of the rest y is equal to an integer,
So it doesn't meet the requirements, so x = 9 is the correct answer.
So the total distance is
3000+250×9=5250
Or 750× (9-(9- 1) divided by 4 = 5250.
Meet all conditions
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I am a college math major, please believe me!
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