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sequence and series

20160618_140646[1].jpghow to solve question number 4
(edited 7 years ago)
Original post by Akhito Kanbara
20160618_140646[1].jpghow to solve question number 4


What have you tried so far? :h:
i would try proof by induction first...
what is induction. the trying method? sean fm i dunno how to to start because my teacher heaches only sum of r or r square. not like this one number to the power of r.
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davros
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Original post by Akhito Kanbara
what is induction. the trying method? sean fm i dunno how to to start because my teacher heaches only sum of r or r square. not like this one number to the power of r.


Induction is a specific technique that's most useful when you're trying to prove a result for positive integers and you're actually given the result that you're trying to prove.

Are you studying for UK A levels or some other course? If induction isn't covered in your textbook, google "principle of induction" or "mathematical induction" to get a start.

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