14.22 - isElem x (Node y left right) | x == y = True |...

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--14.22 data NTree = NilT | Node Int NTree NTree isElem :: Int -> NTree -> Bool isElem _ NilT = False
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Unformatted text preview: isElem x (Node y left right) | x == y = True | otherwise = isElem x left || isElem x right...
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