a) Use the Intermediate Value Theorem to show that the equation 0' + 7x+5=0, has a solution in the interval (-1, 0). b Using desmos calculator to find a solution to x' + 7x + 5 =0 in (-1, 0). Find an equation of the line tangent to the graph of f (x) = V2x + 1 at x = 1. (Use definition of derivative to find the slope of the tangent line)