if the binary operation * is deined on a set of ordered pairs of real numbers

Question

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

Options:

A . (7,11)

B . (23,11)

C . (32,40)

D . (74,40)

Answer: Option D
Explanation :

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