结果出现复数。

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unction output=myfun(x)
output(1)=x(1)^2-108*x(1)+x(2)^2+x(4)+2660;
output(2)=x(1)^2-108*x(1)+x(2)^2+x(5)+2659.7664;
output(3)=5.3*sqrt(x(1)^2-108*x(1)+x(2)^2+2660)-x(3)*sqrt(108*x(1)-x(1)^2-x(2)^2-1259.51)+x(6);
为什么结果出现负数

Accepted Answer

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形如sqrt(108*x(1)-x(1)^2-x(2)^2-1259.51)这种地方,取个x为全零的向量,可不就对负数开方得到复数的虚部了?
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Cassandra Myers
Cassandra Myers on 23 Mar 2023
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