Thinking a. Determine the coordinates of the point on the graph of /(x) - -x" + 3x + 1 where the tangent line is perpendicular to the line y = = x+ 2. b. Write the equation of the tangent line at this point. Write your answer in the form y = ax + &. 16 9. Determine the value(s) of x where the slope of the tangent to g(x) = (x + 5)(x -1) is-7. /4 Communication 10. a. Use the limit definition to determine the derivative of (x) - / x- 1 . b. Determine the slope of the tangent to fix) at (10, 3). 161 1. Show that there is no value of r for which ((x) - -- and g(x) - -x' have tangents with the same slope. /4