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If $f:[2,3] \to R$ is defined by $f(x) =x^3+3x-2,$ then the range $f(x) $ is contained in the interval:

\[\begin {array} {1 1} (1)\;[1,12] & \quad (2)\;[12,34] \\ (3)\;[35,50] & \quad (4)\;[-12,12] \end {array}\]
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(2) [12,34]
answered Nov 7, 2013 by pady_1
 

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