Use Cramer's rule to solve the system below, and state the condition at which solution exists. Note: a, b, c, d are parameters. 2. (6 points) Compute limits. x² - 2x 8 (a) lim 2-2 3. 2 1 + 2/ ax+by = 1 cx+dy=-1 (b) lim (e is Euler's number). 3. (6 points) Find whether functions below are continuous on their respective domains. (a) f(x) = 23 on R. (b) f(x) = |x-1| on R. (c) f(x) = on (0, [infinity]). ex-1 +3