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High School Mathematics - 2
5.2 Laws of Binary Operations




Directions: Answer the following.
Q 1: Let A = N x N and let * be a binary operation on A defined by (a,b)*(c,d) = (ac, bd). Show that (A,*) is associative.
Answer:

Q 2: Let * be a binary operation defined on Q. Check if a*b = a2+b2, for a,b Q is commutative.
No
Yes

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