Answer:
[tex]r^n=a[/tex]
Step-by-step explanation:
Here, the given expression is,
[tex]a^{\frac{1}{n}}=r[/tex]
[tex](a^{\frac{1}{n}})^n=r^n[/tex] ( a = b ⇒ [tex]a^n=b^n[/tex] )
[tex]a^{\frac{1}{n}\times n} = r^n[/tex] ( Because [tex](a^m)^n=a^{m\times n}[/tex] )
[tex]a^1=r^n[/tex]
[tex]a=r^n[/tex]
Hence, First option is true.
