Im havin some real problems with my maths :( I am behidn coz I went on a holiday for easter. I have a test tomorrow and I really need help If anyone could teach me how to do these sort of questions it would be much appreciated. 1. Find all points of contact of horizontal tangents to the curve y=2√x+1/√x 2. Find equation of tangent to y=1-3x+12x²-8x³ which is parallel to the tangent at (1,2) 3. The normal to the curve y=a√x+b/√x where a and b are constants, has equation 4x+y=22 at the point where x=4. Find the values of a and b. I havent had much trouble with other work in the chapter, but I have continously got questions similar to this wrong. Some help would be much appreciated.