There are two numbers a2 and 9. Their mean proportion is b, then (a2� – McqOptions

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1.	There are two numbers a2 and 9. Their mean proportion is b, then (a2 + b2) : (a2 – b2) = ?
A.	5 : 4
B.	3 : 4
C.	3 : 2
D.	1 : 1
Answer» B. 3 : 4

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