Which condition is required for the Integral Test on ∑n=1∞f(n)\sum_{n=1}^{\infty} f(n)∑n=1∞f(n)?
f(n)f(n)f(n) is alternating
∫1∞f(x)dx=0\int_1^{\infty} f(x) dx = 0∫1∞f(x)dx=0
f(n)→1f(n) \to 1f(n)→1
f(n)f(n)f(n) is positive, continuous, and decreasing for n≥1n \geq 1n≥1