Mathematics

Mathematics

Problem

Let f:R→Rf:\mathbb{R}\to\mathbb{R} be defined by f(x)=3−exf(x)=3-e^{x}. Which of the following equals the range of ff? a) (0,3) (0,3) b) (−∞,3) (-\infty,3) c) (−∞,0) (-\infty,0) d) (−∞,3] (-\infty,3]

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