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Core 2 sequence question- need help
Need some help with the second part of this question if anyone can help please 
A sequence u1,u2,u3... is defined by
u1=2 un+1 = 1/1-un for n>=1
i)write down the values of u2 to u5
ive done this and got
u2= -1
u3= 0.5
u4= 2
u5= -1
ii) Deduce the value for u200 showing your reasoning
now i got u200 = -1, which i think is right i just havent a clue how to show how i got that. If anyone can help out there please?
A sequence u1,u2,u3... is defined by
u1=2 un+1 = 1/1-un for n>=1
i)write down the values of u2 to u5
ive done this and got
u2= -1
u3= 0.5
u4= 2
u5= -1
ii) Deduce the value for u200 showing your reasoning
now i got u200 = -1, which i think is right i just havent a clue how to show how i got that. If anyone can help out there please?
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