Answer:
C
Step-by-step explanation:
The relevant rules of exponents are ...
[tex]\sqrt[n]{x^m}=x^{m/n}\\\\x^mx^n=x^{m+n}[/tex]
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The product is ...
x^(2/3)·x^(3/4) = x^(2/3 +3/4) = x^((8+9)/12) = x^(1 5/12)
= x·x^(5/12)
[tex]\displaystyle =x\!\left(\!\sqrt[12]{x^5}\right)[/tex]
