QUESTION 7 Let f (x) = - X x # 1. Find an equation of the tangent line to the graphy= f ( x ) of f at (2,2) . X - O a. 'y=6- 2x O b. v= x- 4 O C. y=4- x O d. y=- -x+3 2 QUESTION 8 Let f (x) =|x- 2. Mark all statements that are true about f (there might be more than one answer that is correct). 0 f is not differentiable at a = 2 because lim f (2th) -f (2) f (2th) -f (2) * lim h-0- h h-0+ h Of is not continuous at a = 2. O f is differentiable at a = 2. O f is not differentiable at a = 2 because lim f (2th)-f(2) does not exist. h-0 hQUESTION 6 A ball is thrown straight upwards with an initial velocity of v =30 m / from a height of | meter above the ground. The height h () (measured in meters) of the ball as a function of time , (measured in seconds) after it is thrown is given by h () = 1 + 30t-4.912. What is the instantaneous velocity v ( ) of the ball at time t > 4 s when it is at hight 30 m above the ground. Please enter your answer in decimal form with two significant digits after the decimal point (without m /)