Evaluate the summation of 25 times 0.3 to the n plus 1 power, from n equals 2 to 10..

0.005

0.321

0.964

10.714

Question

Evaluate the summation of 25 times 0.3 to the n plus 1 power, from n equals 2 to 10..

 0.005

 0.321

 0.964

 10.714

mathmale · Answer

Could you possibly write this using Equation Editor?  It'd be clearer for potential helpers.$$\sum_{2}^{10}25*0.3^{n+1}$$

mathmale · Answer

Look carefully.  What kind of sequence is this?

Are you aware that there's a formula for the sum of the first n terms of such a sequence?

anonymous · Answer

I have no idea how to do this, I just need the answer real quick /:

mathmale · Answer

I understand you're under pressure to come up with answers, but i can help only if you're willing to learn HOW to obtain such answers properly.

anonymous · Answer

I know, sorry about that. :( My friend thinks it's B, can you at least tell me if she's right?

mathmale · Answer

I truly don't mean to be unkind, but no.  Again, if you're willing to invest the time and effort necessary to learn this material, I'm your man!

anonymous · Answer

that's alright, thanks anyway though