Mathematics · Real Analysis
Let f : ℝ → ℝ be a continuous function and suppose f(x) = 0 for all rational numbers x. Then:
- 1No conclusion can be drawn
- 2f must be constant but not necessarily zero
- 3f may not be identically zero
- 4f ≡ 0 (f is identically zero for all real numbers)✓
Correct answer
f ≡ 0 (f is identically zero for all real numbers)
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