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D Question 6 Which statement(s) is(are) true? (1) f(x) = (x] is differentiable at 0. () f(z) is differentiable at 0 . ( [f(z) . 9(2?) ]' = f(z) - 9(2?) + f(z) . 9 (12) O (i), (ii), and (iii) None of the statements are true. O (iii) only O (ii) only O (i) only