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If U = {x|x in N, xlt 8 }, write the uni...

If U = `{x|x in N, xlt 8 }`, write the union of the following sets: `A={a|a` in U, a is an odd number`}` and `B= {b|b ` in U, b is a divisor of `4}`,

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`A cup B = {1,2,3,4,5,6,7}`
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