Prove that 3+2 square root 5 is irrational.

2. Prove that 3 + 2√5 is irrational.

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Class 10

Real Numbers

Exercise 1.2

1. Prove that (sqrt{5}) is irrational.

2. Prove that (3+2sqrt{5})  is irrational.

3. Prove that the following are irrationals :

(i) (1over{sqrt{2}})

(ii) (7sqrt{5})

(iii) (6+sqrt{2})

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