For problems 1-3, find the derivative of f(x). 1. f(x)=12x - 4x +5x-21x-5x+23 2. f(x)=12x7-4x4 +5x-21x5x +23 3 ((x) = -7/7 - 7 + 8 /x 3. f(x)=- 4. Find the coordinates of points where the graph of f(x)=x-3r- horizontal tangents. 5. Write the equation of the tangent line to y=x*-4x-2 at the point x = 2. -3x-16x+8 has Given f(x)=2x-5, find 1. f(x+h) 2. f(x+h)-f(x) f(x+h)-f(x) 3. h f(x+h)-f(x) 4. f(x)=lim- 40 5. ''(-2) Do the same process for f(x)=7x-3x+2 and find /'(-2.5)