You must impicitly differentiate in te first problem, solve for and evaluate at the given pointto find the slope of the tangent line. Then, using the given point along with the slope, develope the equation for the line.

For the second, evaluate at to find the slope of the tangent line. then go back and plug 1 into the original function to have the necessary point needed to develop the equation to the tangent line. Then find the x-intercept of this line.