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hi i was practisin a gcse maths paper and need some help with last question;

x and y are two positive irrational numbers. x + y is rational and so it x times y.

a) by writing the 1/x + 1/y as a single fraction explain why 1/x + 1/y is always rational.

b) explain why (x-y) is always rational

c) write down two possible positive irrational values for x and y

i can do part A easily enough its just the second 2.

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# Help with gsce irrational number question

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