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ladessa
[460]
2 years ago
7
Two numbers, 3 and a, have a geometric mean of 9. Find the value of a.
Mathematics
Answer
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1
answer:
Ket
[755]
2 years ago
4
0
The geometric mean of two numbers x and y is √(xy).
So, if the geometric mean of 3 and a is 9 =>
9 = √(3a)
=> 9^2 = 3a
=> a = 9^2 / 3
a = 81 / 3
a = 27
Answer: the value of a is 27.
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