@undeadknight26

Question

@undeadknight26

vera_ewing · Answer

attachment

tkhunny · Answer

Rule #1 for Convergence.  Individual terms must head for zero.

vera_ewing · Answer

Okay, so is it C or D?

tkhunny · Answer

Do the individual terms head for zero?

vera_ewing · Answer

I think so...

tkhunny · Answer

Demonstrate the first three terms, please.

vera_ewing · Answer

I'm not sure

tkhunny · Answer

i = 1 -- What do you get?
i = 2 -- What do you get?
i = 3 -- What do you get?

vera_ewing · Answer

I don't know. That's why I think it's C or D because the sum can't be found right?

tkhunny · Answer

Very bad answer.  Please evaluate the first term.  Substitute i = 1 and evaluate the argument.

tkhunny · Answer

Is this a placement exam?

anonymous · Answer

Wow, that was real ice @tkhunny.

vera_ewing · Answer

No it's a review. And how would I evaluate? I'm not sure how to do it.

tkhunny · Answer

It's called honest and direct.  Some mistake it for rudeness.

Vera, what is the first term of the sequence?  Substitute i = 1 and evaluate.  You MUST be able to do this or you should not have been given this problem or you are in the wrong class.

tkhunny · Answer

This is not a review issue.

i = i suggests $15\cdot 4^{1-1} = 15\cdot 4^{0} = 15\cdot 1 = 15$

You do the second term, i = 2.