数学-江西 2023-2024学年高二下学期第一次阶段性考试

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2 1 16 3 62a2a1da12d1

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(

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d=2,[12]]^_fi2Z`Nb1111Ø,½,,1defi,,fghij$klƒn,\$(12,2)(220),(12,2) —→ —→2

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5 6 16 65 5 55$d= 槡

– —→ FB

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1 2 2 3

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1 3

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n

n n

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n+1

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a·a,7½mn358,M?÷“n,\,nZM№$an =am a5

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2n12,cS

an

2n13n1,c

2n23n4,(9d)7½cc2n1322310,<c

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16

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2n

2n+1–37½9=–+ n 27½9=–+

22

23

2n

2n

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