If f(x) = x^2 + 4 then range of f(x) is given by?(a) [4, ∞)(b) (-∞, ∞) – {0}(c) (0, ∞)(d) None of the mentionedThis question was addressed to me during an online exam.I'd like to ask this question from Domain and Range of Functions in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

If f(x) = x^2 + 4 then range of f(x) is given by?(a) [4, ∞)(b) (-∞

1.	If f(x) = x^2 + 4 then range of f(x) is given by?(a) [4, ∞)(b) (-∞, ∞) – {0}(c) (0, ∞)(d) None of the mentionedThis question was addressed to me during an online exam.I'd like to ask this question from Domain and Range of Functions in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics
Answer» RIGHT option is (a) [4, ∞) To EXPLAIN: Since minimum VALUE of x^2 is 0, THUS x^2 +4 may take any value between [4,∞).

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