Let f:D→{1,3,9,19} be a function defined as f(x)=2x2+1, where D is t – InterviewSolution

1.	Let f:D→{1,3,9,19} be a function defined as f(x)=2x2+1, where D is the domain of f. If range and co-domain of the function f are equal, then the maximum number of elements in set D can be
Answer» Let $f : D \to {1, 3, 9, 19}$ be a function defined as $f (x) = 2 x^{2} + 1$ , where $D$ is the domain of $f$ . If range and co-domain of the function $f$ are equal, then the maximum number of elements in set $D$ can be

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