dy 1. =1 -4u -10 and u = Vx + 8x , find dx when * = 4. 1. If y -u 2 -41/-10 ,

dy 1. =1 -4u -10 and u = Vx + 8x , find dx when * = 4. <. determine the value of k for which kx has a horizontal tangent at what are coordinates point on graph is parallel to line with equation y find slope curve vx where cuts y-axis. all tangents make positive x-axis. include sketch. think about angle makes d f g if evaluate dx an object moves in straight its position time seconds given by s measured metres. not moving b speed does comes back original c when speeding up>

1. If y -u 2 -41/-10 , find 2. Determine the value of k for which flx) = 412 dy dx when 6 has a horizontal tangent at 2 3. What are the coordinates of the point on the graph of at which the tangent is parallel to the line with equation 4. Find the slope of the tangent to the curve at the point where the curve cuts the raxis. 5. Find all the tangents on what slope a 450 angle makes) which make 450 with the positive x-axis. Include a sketch. (Hint: think about g(x) , evaluate dr 7. An object moves in a straight line with its position at time t seconds given by at X l s(t) = 3t + t2 , where s(t) is measured in metres. a) b) c) At what time is the object not moving? What Speed does the Object comes back to its original position at? When is the Object Speeding up?