Use the Integral Test to determine whether the infinite series is convergent. ∞ n² Σ 9 n=21 (n³ +9) ² To perform the integral test, one should calculate the improper integral √21 A dx = Enter inf for ∞, -inf for -∞, and DNE if the limit does not exist. By the Integral Test, ∞ the infinite series Σ n n=21 (n³ + 9)

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