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Let a, b, c be the three rational number...

Let a, b, c be the three rational numbers where `a=(2)/(3),b=(4)/(5)` and `c= -(5)/(6)`
Verify:
(i) `a + (b + c) = (a + b) +c` (Associative property of addition)
(ii) `a xx (b xx c) = (a xx b) xx c` (Associative property of multiplication)

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