已知数列{an}满足an+1=an-an-1(n≥2),a1=1,a2=3,记Sn=a1+a2+…+an,则下列结论正确的是( )
A.a100=-1,S100=5 | B.a100=-3,S100=5 |
C.a100=-3,S100=2 | D.a100=-1,S100=2 |
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已知数列{an}满足an+1=an-an-1(n≥2),a1=1,a2=3,记Sn=a1+a2+…+an,则下列结论正确的是( )
A.a100=-1,S100=5 | B.a100=-3,S100=5 |
C.a100=-3,S100=2 | D.a100=-1,S100=2 |