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How to find the roots of equations in Matlab v7.12

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MissA
MissA 2012-12-12
how can I find roots for equation x^3=a
where a is a defined variable = 0.3 (a=0.3) and '^' means 'power'
Please help
thanks MissA

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回答（2 个）

Muruganandham Subramanian
编辑：Muruganandham Subramanian 2012-12-12
try this:
a=0.3;
x=nthroot(a,(-1/3));
for more info,
>>help nthroot
Walter Roberson
Walter Roberson 2012-12-12
roots([1 0 0 -a])

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