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Question

Rationalise: 13 211


A

3 + 21141

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B

3 + 21141

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C

3 + 21143

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D

3 + 21143

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Solution

The correct option is A

3 + 21141


13 211 -----(1)

Rationalising factor = 3 + 211 ------(2)

Multiply and divide the equation (1) with equation (2)

13 211 =13 211×3 + 2113 + 211 =3 + 21141


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