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If `X={8^n-7n-1 | n in N}` and `Y={49n-49| n in N}`. ThenA. `X sub Y`B. `Y sub X`C. `X = Y`D. `X nn Y = phi` |
Answer» Correct Answer - A `X = (8^(n) - 7 n - 1| n in N } = { 0 , 49, 490, "….."}` `Y = {49n - 49 | n in N} = {0, 49, 98, 147, "….."}` Clearly, every elements of X is in Y but every element of Y is not in X. `:. X sub Y` |
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