antonio9768
26.10.2019 •
Mathematics
What is the mean, median, and mode?
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Ответ:
Mean = 7.5
Median = 7.5
Mode = 5
Step-by-step explanation:
Please refer to the image attached
1. Mean
Mean = Total Sum / Total Number of Entities
Mean = 225/30
= 7.5
2. Median
Median is the average of the 15th and 16th Entities
15th Entity = 7
16th Entity = 8
Average = (8+7)/2 = 15/2 = 7.5
3. Mode
The entity which gets repeated for most of the times.
From the table we see that 5 gets repeated for 9 times which is highest frequency . hence Mode = 5
Ответ:
y = e^(2x) cos 3x is a explicit solution of y'' − 4y' + 13y = 0
Step-by-step explanation:
y'' − 4y' + 13y = 0 (1)
Verify that y = e^(2x) cos 3x is a explicit solution. We derive this solution:
y'=2e^(2x) cos 3x-3e^(2x) sin 3x (2)
y''=4e^(2x) cos 3x - 6e^(2x) sin 3x -6e^(2x) sin 3x -9e^(2x) cos 3x
y''=-5e^(2x) cos 3x - 12e^(2x) sin 3x (3)
In order to verify, we replace (2) (3) in (1):