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05.03.2020 •
Mathematics
78 is the geometric mean of 30 and what number
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Ответ:
202.8
Step-by-step explanation:
The geometric mean of 2 numbers a and b is
Here a = 30 and mean = 78, thus
To clear the radical square both sides
(
)² = 78², that is
30b = 6084 ( divide both sides by 30 )
b =
= 202.8
Ответ: