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Selina Solutions Class 9 Mathematics Solutions for Exercise 1(B) in Chapter 1 - Chapter 1- Rational and Irrational Numbers

Question 3 Exercise 1(B)

State, in each case, whether true or false:

(i) √𝟐 + √𝟑 = √𝟓

(ii) 𝟐√𝟒 + 𝟐 = 𝟔

(iii) 𝟑√𝟕 − 𝟐√𝟕 = √𝟕

(iv) 2/7 is an irrational number.

(v) 5/11 is a rational number.

(vi) All rational numbers are real numbers.

(vii) All real numbers are rational numbers.

(viii) Some real numbers are rational numbers.

Answer:

(i) False

(ii) True

(iii) True

(iv) False

(v) True

(vi) True

(vii) False

(viii) True

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