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public static double function(double x,int n){
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if(x==0)
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{
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return 0.0;
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}
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if(n>0)
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{
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return Pow(x,n);
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}
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else
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{
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return 1/Pow(x,-n);
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}
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}
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public static double Pow(double x,int n){
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if(n==0)
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return 1;
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double tem=Pow(x,n/2);
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if(n%2==0)
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{
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return tem*tem;
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}
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else{
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return tem*tem*x;
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}
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}
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