# Hidden Roots ........

Calculus Level 2

The function $f(x)= x^{3}-11x^{2} +19x+13$ has zeros $a_{1},a_{2},a_{3}.$ Then what is the value of $[ a_{1} ]+[ a_{2} ]+[ a_{3} ]?$

Note: $[m]$ Represents the greatest integer less than or equal to $m.$

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