If the binary operation * is deined on a set of ordered pairs of real numbers as (a, b) * (c, d) = (ad + bc, bd) and is associative, then (1, 2) * (3, 5) * (3, 4) equals

If the binary operation * is deined on a set of ordered

1.	If the binary operation * is deined on a set of ordered pairs of real numbers as (a, b) * (c, d) = (ad + bc, bd) and is associative, then (1, 2) * (3, 5) * (3, 4) equals
A.	(74,40)
B.	(32,40)
C.	(23,11)
D.	(7,11)
Answer» B. (32,40)

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If the binary operation  is deined on a set of ordered pairs of real numbers as (a, b)  (c, d) = (ad + bc, bd) and is associative, then (1, 2)  (3, 5)  (3, 4) equals

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