PG entrance exam CUET PG 2025 Mock Test Mathematical Science Analysis Continuity & Differentiability

Which of the following set is convex ? 

1
{(x, y): x2 + y2 ≥ 1}
2
{(x, y): y2 ≥ x}
3
{(x, y): 3x2 + 4y2 \(\geq\) 5}
4
{(x, y): x≥ 2, y ≤ 4}
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