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1. Show that the equation (k-1)*x^2 + 2x - (k-3) = 0 has no real roots for all values of k. 2. We know that the coordinates of A are (4/3, 0) and the coordinates of B are (0, -4). Let O denote the origin. Find the area of triangle OAB. 3. f(x) = x^2 - 6x + 13 for x >= 3 Find the inverse...

(x+3) (x+2) (x+1) = ? go through every step please