Functions

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by liferocks » Thu May 27, 2010 10:39 pm
f2=f1-1=-1
f3=f2-1=-2
f4=f3+1=-1
f5=f4-1=-2
f6=f5-1=-3
f7=f6+1=-2
f8=f7-1=-3
f9=f8-1=-4
f10=f9+1=-3

so fn+1=(-1)*(n/3)..when n is a multiple of 3

hence f49=(-1)*(48/3)=-16
f50=[spoiler]f49-1=-17[/spoiler]

Ans option 3
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