josiahsurfer
25.12.2020 •
Mathematics
Find the area that is enclosed by the parabola y = x²-3x line y = 2x and line y = -x
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Ответ:
39/2
Step-by-step explanation:
First, we find the points of intersection (POI) of the curve and one of the lines:
x²-3x=2x
x²-5x=0
x(x-5)=0
x=0,5
Next, we find the POI of the curve and the second line:
x²-3x=-x
x²-2x=0
x(x-2)=0
x=0,2
To better visualize this, you can go on Desmos.
The area enclosed by all three lines is going to be the area enclosed by the curve and y=-x () subtracted from the area enclosed by the curve and y=2x ().
Since 2x is greater than the curve in the interval [0,5],
=
Solving this, you would get 125/6.
Since -x is greater than the curve in the interval [0,2],
=
Solving this, you would get 4/3.
=125/6-4/3=39/2
Hope this helps!
Ответ:
3 miles per hour.
Step-by-step explanation: