D. NOT ENOUGH INFORMATION IS GIVEN E. NONE OF THESE 3. FOR THE EXPRESSION 2x* + 2x2y = 42 WHAT IS THE VALUE OF dy dx x=1 A. -4 B. 1/2 C. 2 D. NOT ENOUGH INFORMATION IS GIVEN E. NONE OF THESE 4. WHAT IS THE SECOND DERIVATIVE (NOT SIMPLIFIED) OF THE FUNCTION f(x) = cos(x) - tan(x) ? A. f"(x) =-cos(x) -2sec(x) . sec(x) tan(x) B. f"(x) = cos(x) + sec?(x) tan?( C. f"(x) =-cos(x) + sec(x) tan?(x) D. NOT ENOUGH INFORMATION IS GIVE E. NONE OF THESE