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hey dear ☺☺☺
If x and y are rational numbers, then by definition they can be expressed as x = a/b and y = c/d for some integers a, b, c and d. .
xy = (ac)/(bd). Since the product of two integers is an integer, this means you have "integer / integer", so xy is rational.
Similarly, x+y = (a/b) + (c/d) = (ad + cb) / bd. Since ad, cd, and bd are all integers, and since adding two integers gives you another integer, then what you have here again is an integer over an integer. So x+y is rational too....
I hope it help's u...✌✌✌
If x and y are rational numbers, then by definition they can be expressed as x = a/b and y = c/d for some integers a, b, c and d. .
xy = (ac)/(bd). Since the product of two integers is an integer, this means you have "integer / integer", so xy is rational.
Similarly, x+y = (a/b) + (c/d) = (ad + cb) / bd. Since ad, cd, and bd are all integers, and since adding two integers gives you another integer, then what you have here again is an integer over an integer. So x+y is rational too....
I hope it help's u...✌✌✌
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