7)Given the following exponential function f, where c > 1. f(x)= a (c))+k In addition, a < 0, b < 0, h <0 and k < 0. Which of the following statements is TRUE about the given function? A. The range of the function is ] - ∞, k [. B. The function has a positive y-intercept. C. The function decreases over its domain. D. The function has a positive zero.

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