If ∑n=0∞anxn\sum_{n=0}^{\infty} a_n x^n∑n=0∞anxn converges at x=5x=5x=5, what can we say about the radius RRR?
R<5R < 5R<5
R≥5R \ge 5R≥5
R=5R = 5R=5
R≤5R \le 5R≤5