Anyone good at maths?

[Freak]

A sequence u1,u2,u3... is defined by

 

u1 = 3 and Un+1 = 1 - 1/Un for n>= 1

 

Write down the values of u2, u3, and u4

[McFirm]

-Brainfart-

[Eliot]

u2 = 1 - 1/3 = 2/3

u3 = 1- 1/(1/3) = -2

u4 = 1 - 1/-2 = 3/2

Edited February 23, 2014 by Eliot

[RoomScape]

Sorry, I don't speak that language.

[Freak]

u2 = 1 / (1- 3) = -(1/2)

u3 = 1/ (1 - (-1/2)) = 2

u4 = 1/(1-2) = -1

 

 

 

yeah you're right I did it wrong :P

[Eliot]

yeah you're right I did it wrong

See my edited post, that quoted answer I made a little mistake.

 

Edit: Oops it should actually be right now.

Edited February 23, 2014 by Eliot

[Freak]

See my edited post, that quoted answer I made a little mistake.

 

Edit: Oops it should actually be right now.

 

 

If I had been bothered to check it I would have been fine haha :P

 

Thanks for your help!