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If $$a^{\frac{2}{3}}=b^{\frac{2}{3}}$$ for$$ a \neq 0 and b \neq 0$$, then which of the following statements must be true?Indicate all possible values.
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A.$$a^{\frac{a}{b}}=1$$
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B.$$a^{\frac{a}{b}}=-1$$
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C.$${\frac{a}{b}}^{2}=1$$
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D.$$a=\frac{2}{3}$$
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E.$$a^2=b^2$$
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F.$$\sqrta=\sqrtb$$
C,E显示答案
