1.

If x is rational and y irrational that show (x+√y) is irrational​

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Answer:

Let US assume to the contrary that x+√y is rational

So x+√y can be written in the form a/B,where a and b are co-primes and b not EQUAL to 0

x+√y=a/b

√y=a/b-x

√y=a-bx/b

Since x,a,b are all integers, therefore they are rational

But this contradicts the fact that√y is irrational

Hence our assumption is incorrect.

Therefore x+√y is irrational.

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