Consider the function f (x) = x2 ex cos (x ) e What is f' ( TP) ? a) Ter ( 2 - 71 ) b ) Tre " ( 2 + (1 ) ( ) - Te TT ( 2 + TT ) d . ) - Tret ( 2-T1 ) If g ( x) = - 3x2 en ( x ) , then what Is the value of 'll ( 1/ 2 ) a ) - 4 6 ) None of the above C) - 12 d ) 0 el - 24 x3 1lax 2 - 15x +10. At whichd) 0 ex - 24 Suppose that f ( x ) = X3 + 6x 2 - 15x + 10. At which X values does f ( x ) have a horizontal tangent line ? a ) 5 6 ) - 1 d ) 5