Ia+2I+Ia-1I化简
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Ia+2I+Ia-1I化简
Ia+2I+Ia-1I化简
Ia+2I+Ia-1I化简
若a+20
∴Ia+2I+Ia-1I=(a+2)+(a-1)=a+2+a-1=2a+1
若a+2≥0且a-1≤0
则-2≤a≤1
这时,Ia+2I+Ia-1I=(a+2)-(a-1)=a+2-a+1=3
因此,当a1时,Ia+2I+Ia-1I=2a+1
要讨论啊,分几种情况。
第一种:a>=1
原式=a+2+a-1=2a+1
第二种:2<=a<1
a+2+1-a=3
第三种:a<-2
-a-2+1-a=-2a-1
1.a>=1
原式=a+2+a-1=2a+1
2.-2<=a<1
a+2+1-a=3
3.a<-2
-a-2+1-a=-2a-1
Ia+2I+Ia-1I化简
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Dim ia(1 To 10) As Integer,imin As Integer,n As Integer,i As Integer,j As Integer,t As Integern = 6For i = 1 To n - 1 imin = i For j = i + 1 To nIf ia(j) < ia(imin) Then imin = jNext jt = ia(i)ia(i) = ia(imin)ia(imin) = tNext i
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