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Let f(t) = -9. a) Find all values of t for which f(t) is a real number. te (-inf,-0.25)U(-0.25, Write this answer in interval

Let f(t) = -9. a) Find all values of t for which f(t) is a real number. te (-inf,-0.25)U(-0.25, Write this answer in interval notation. b) When f(t) = 6, te {-1,1} Write this answer in set notation, e.g. if t = A, B, C, then te{A, B, C). Write elements in ascending order.

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