Math Is Fun Forum

mathwizardhatshoe

Guest

Simple Integral?

i need to use the integral test to find whether or not a series is convergent or divergent

∫(1/x²) dx

for this i only need to find wether or not they are convergent or divergent

they are both series from n=1 to n=∞

∑ (  (n+1) / (2n+3)  )

∑ (  (sin²n) / (n²)  )

any help? steps please i am having trouble with this stuff thanks

Ricky

Moderator

Registered: 2005-12-04

Posts: 3,791

Re: Simple Integral?

For the first, just use the comparison test.  For the 2nd, use the comparison and then the integral test.

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