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Active Calculus 2nd Ed

Activity 6.5.3.
Determine whether each of the following improper integrals converges or diverges. For each integral that converges, find its exact value.
(a)
\(\int_1^{\infty} \frac{1}{x^2} \, dx\)
(b)
\(\int_0^{\infty} e^{-x/4} \, dx\)
(c)
\(\int_2^{\infty} \frac{9}{(x+5)^{2/3}} \, dx\)
(d)
\(\int_4^{\infty} \frac{3}{(x+2)^{5/4}} \, dx\)
(e)
\(\int_0^{\infty} x e^{-x/4} \, dx\)
(f)
\(\int_1^{\infty} \frac{1}{x^p} \, dx\text{,}\) where \(p\) is a positive real number