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Question 20 For which value is a is the function f (@) = discontinuous? 0z=1 Oz = a 02=0 O z = -a Question 21 A removable discontinuity occurs when: O The left- and right-hand limits are different O The function jumps at a point O The function oscillates wildly O The function is not defined at a point but the limit exists Question 22 Which function is an example of a piecewise function that may have a jump discontinuity? Of(x) = =2 Of (x) = Va 20 Of(x) = 12