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cranfordjacori
22.11.2020 •
Mathematics
When a natural number is multiplied by itself. The result is called a perfect square. Since 1x1 = 1, 2x2=4, 3x3=9 and so on, then the numbers 1,4,9 etc are perfect squares. Using this knowledge work out which year in the 18th century (the years 1701 through to 1800) was a perfect square?
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Ответ:
the amplitude is the distance from the maximum to the midline or the distance from the minimum to the midline. both are the same thing.
we can find the equation of the midline by taking the average of the maximum and minimum. the midline is in between the maximum and minimum.
the maximum is 1. the minimum is -7.
the average: add the two and divide by 2.
so the midline is at y=-3.
the distance between midline at y=-3 and the maximum at y=1 (take the absolute value because we do not care if a distance is negative or not) is
the amplitude is 4. you can count, from midline y=-3, count up to the maximum. that takes 4 steps.
then count, from midline y=-3, count down to the minimum. that also takes 4 steps.