Induction

[mathhtutorr]

Prove with math induction.

 

[Dr.Peterson]

Prove with math induction.

It appears that you neglected to read this:

Posting Guidelines (Summary)

Welcome to our tutoring boards! :) This page summarizes the main points from our posting guidelines. As our name implies, we provide math help (primarily to students with homework). We do not generally post immediate answers or step-by-step solutions. We don't do your homework. We prefer to...

www.freemathhelp.com

We're here to help you write a proof, not to write a proof for you. Where do you need help?

Did you check whether it's true for n=1?

Then what will the induction hypothesis be?

 

[JeffM]

Unless you want to practice induction, I’d try a direct proof

[MATH](1 - r) * \sum_{j=0}^n r^j = \left ( \sum_{j=0}^n r^j \right )- r \left ( \sum_{j=0}^n r^j \right ).[/MATH]

 

[jonah2.0]

Beer soaked ramblings follow.

Prove with math induction.

Is that a challenge problem? I'm slightly intoxicated at the moment so it's not obvious if it is or not.