Induction

[mathhtutorr]

Prove with math induction.

 

[Dr.Peterson]

Prove with math induction.

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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.