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If R = `{(x, y) : x in N, yin N and 2x + y = 10}`. then find `R^-1`

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 13-EXERCISE
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  2. Arithmetic mean of 1, 2, 3,..-..... , 100 (1st 100 positive integers) ...

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  3. If R = {(x, y) : x in N, yin N and 2x + y = 10}. then find R^-1

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