2. Rationalize each denominator. 53 e. 23+4 32 f. 23-5 3. Rationalize each numerator. 3-7 e. 4 23+ 7 f. 5 7. Calculate the slope of the tangent to each curve at the given point or value of x. 2 c. y= 4 4 x- (6.1) 2' (6, 1) d. f(x) = x + 4, x = 5 11. Find the equation of the tangent at the given value of x. d. f(x) = 5x- 8x + 3, x = 1 12. Find the equation of the tangent to the graph of the function at the given value of x. x x + 3' a. f(x) = b. f(x) 5r 1 2x + 5 x = -5 x = -1