Son las que contienen la variable “x” dentro de un signo radical. Las funciones [sub][img]data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADEAAAAWCAIAAADmV+PFAAAA4UlEQVRIie3V0Q2EMAgAUOZiIOZhGpZhGO7DtlqKd3hptB/yYSSiPGmTgq0X8DQgiLtN8DUeM/2uucHR9VvNlAHZa3pNqU45kB1NQgAAgKwtb/fTTa7ZltastwsBkJREmTpT+c4Y7Y28qTRAINmuXeVQtQ+KZ44pWjtlhGAxXN0+KGVO/X7U+3hQnIIqapzyicmvW32WWLutvWOFJmUiClDgyxCQmWbs7u5YHU1CyGrKiKz9EAJTdtPmTG1srkdtUrLjEDxfZIonYF14y8zqAOMdN4X1l8nPbzLrummxWNH0AZK2fckyS/GkAAAAAElFTkSuQmCC[/img][/sub] e [sub][img]data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADoAAAAVCAIAAACYI2qcAAAA7UlEQVRIie2W3Q2FIAyFO1cH6jydhmU6TO8D/1C9BEVD4nkwVg/ycSxR0K0EbwNkwamC513EUonpzPMAx6B2wh1h1Q93Uh/uMg2yaonrCAAAkCXV6XyxKtyGw5exqpflCIBcKISpwg3P6ZVG3IIb5kYg54+Vs3PleHkq3IlVGc0gjGC83caX4xXmq6FZWOUXNV20vH2yqoe4bSPEe9eaIX/6C0QTV5iIDF5obQjITIs3WfXX0uM6QhYVRmSpozNwb9g7A0rEJa6fPs4fqjK6dmXOPYCqetDH/0epaozd7u51uoDbpv6QpnD30Wa4P+mBDZCcrqoyAAAAAElFTkSuQmCC[/img][/sub] , son mitades de parábola “tumbada”. [br][list][*]Su dominio es [sub][img]data:image/png;base64,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[/img][/sub][/*][*]La parte de raíz positiva es creciente y la de signo negativo decrece.[/*][*]La primera es cóncava y la segunda es convexa[/*][/list]

[b][color=#1e84cc][u][i]Casos particulares:[/i][/u][/color][/b][br] [br][table][tr][td][img]data:image/png;base64,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[/img][br][/td][/tr][/table]Su dominio es [sub][img]data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADEAAAAZCAIAAAAXAVEQAAABDklEQVRIie2WyxXEIAhFrYuCqIdqaIZizEKNP4ImOaNZzNvFKF4fijr/PbndAIr+THOKTIwuCnkvkC+ZgGQLAWNrw34m7xnr7BhMQuCcW8NamTXwiXGRfeVENlPrqikheHFAiqlMpltIGlNMf4idPvTDLQSp2WJidMipSoxz2DHlBkZAhDOIEKizxUaDKdAgp/WOLGuZhDCHZKzsqf7lHqHDNVOVuDygX50uZCHisl81AdMDpgpJCMbJs3xqbHrGNOeSyZQbAhHmkFqJGTIVSFN7SWXyObUh+JloLdzEHtdv5XieVcR39WmyFlyq3wzvNVsz9aE/ec/M3y3LdOcOXqPmCbX/ndlfqh9+j39KB4WuAdtqKFxNAAAAAElFTkSuQmCC[/img][/sub]. La curva va hacia la derecha[br] Si [i][b]a>0[/b][/i], indica que va por encima del eje X.[br] Si [b][i]a<0[/i][/b], indica que va por debajo del eje X.[br][br][table][tr][td][img]data:image/png;base64,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[/img][/td][/tr][/table]Su dominio es [sub][img]data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAWCAIAAAANYFjGAAAA+0lEQVRIic2WyRXFIAhFqYuCqIdqaIZi8heZRAX1n0Tzlg7hMhlg+6RgNcCmjLCL5FossYSS7WkSirCEYAVUjPV+oI6MIWs3ljJOiZRQSeVjzcpf3Y6HJVQJrauzfZA17aUOxxzvHSxl7A/WnW4hJMKrWJSx4ZsQkAgBZCXmYGXLDSqy30tumr0q1XlcGZOLA1inU6VQ0kMmQMIBlsmgMflwtLJgxViGShkThx7Aumtrh6LbWrX5q1SZwaDkBzpxs1V7pTvyLKGydRVgDT4QbR2vRmHbwZ/7nIYN0IX19M+naIY/sRoF+65ag82auaaBtWDi6pxOP6GPYv0Alq+VMRYMZYcAAAAASUVORK5CYII=[/img][/sub], [i]-x [/i]en el radicando indica que la curva va hacia la izquierda.[br] Si [i][b]a>0[/b][/i], indica que va por encima del eje X.[br] Si [i][b]a<0[/b][/i], indica que va por debajo del eje X.