How the hell do you figure out that this series diverges? I'm completely lost

How the hell do you figure out that this series diverges? I'm completely lost...

Well you can use AST to rule out the (-1)^n, then maybe ratio test (If L > 1, series diverges).

Google root/ratio test if you don't know it.

What's AST?

as n goes to infinity i think 7n/(8n+5) goes to 1, so would that be enough?

Just do ratio test faggot

You got a C didn’t you

Scroll down, not-converging does not imply divergence. It behaves just like the sum over (-1)^n.

It goes to 7/8ths, you suck suck at this

Also forgot that if it has that you need to do alternating series test.

>ITT

Okay, so you need to use the alternating series test AND the ratio test? Does that even work? Because the ratio test comes out as inconclusive.

Hi Rybri

That's ridiculous.

I would never wear such an oversized shirt. And I always make sure to have good posture.

When ratio test is is inconclusive try alternating series maybe even comparison test could work if you choose the right one. I fucking hate this quarter of calc.

L'Hospitals Rule my boy. Take limits of function over its derivative. I forget the postulates though so you'll have to reference you're handy dandy calc book for those.

...

What's even happening there?

This shit is ridiculous. I swear, my professor is just fucking with the class.

This part of calc is ridiculous because of all the test you have available.

That looks like the limit test.

ITT mathfags give op plausible but wrong Answers to his homework

This wolframalpha?

/thread

The associated sequence doesn't even converges to 0. That's enough.