Tangent Line Problems Use the limit definition to find the general equation for the slope of any tangent line and the slope of the tangent line at the given value f ( x th)-f(x) m. = lim h-0 h 1. f(x) = x2 +1 at x =2 2. f(x) = x3 -2 at x=1 3. f (x) = 3x2 - 2x +5 at x =4 f ( x ) = at x = 3 4. X f ( x)= X at x = 3 5. x - 2