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The relation R is defined on the set of natural numbers as a, b: a=2b. The R-1 is given by

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a
2, 1,  4, 2, 6, 3.....
b
1, 2, 2, 4, 3, 4....
c
R-1 is not defined
d
None of these

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detailed solution

Correct option is B

R=1, 2, 2, 4, 3, 6.....,So, R-1={1, 2, 2, 4, 3, 6.....}

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