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- 医师定期考核
答案:
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1.1 a11…1 a3( )n1 a
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2.1 n1 n
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3.a1=(a,1,1),a2=(1,a,-1),a3=(1,-1,a
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4.=A3(1 B3)B . =A3*(1 B3)C . A3*(1 B3)D . =A3 A3B3
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5.n1 = { 'a':1, 'b':2 }n2 = n1n1['a'] = 5s = n1['a'] + n2['a']print(s)代码的结果是?
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6.4.把向量β表示为向量组a1,a,a3,a4的线性组合:(1)a1=(1,1,a=(1,1,0),a3=(1,0,0),a=(10,0,0),β=(0,2,0,-1
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7.在等差数列an中,已知a1=1,a3=5,则a10=( )
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8.在等差数列{an}中,已知a1=1,a3=5,则a10=( )
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9.已知 a1 , a2 , a3 , a4 成等比数列,且 a1 a2 a3 a4 ln(a1 a2 a3 ) .若 a1 1 ,则A、a1 a3 , a2
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10.已知数列 a1,a2,a3,a10,则 a1-a2 a3- , A9 - a10≥ 0.(1)an ≥ an 1,n=1,2,,9.(2)a2n ≥ a2n 1, n=1,2,,9.