If r^n=a , then which of the following are true statements?

Check all that apply.
n1/r = a

n√a = r

a1/n = r

ar = n

Question

If r^n=a , then which of the following are true statements?

Check all that apply. 
        n1/r = a

         n√a = r

         a1/n = r

         ar = n

anonymous · Answer

I guessed n√a = r and  a1/n = r ...

solomonzelman · Answer

$$r^n=a~~~~~~->~~~~~~~~~~~a=\sqrt[n]{r}$$

anonymous · Answer

what does that even mean? I'm so confused.

anonymous · Answer

$$r=a ^{\frac{ 1 }{n }}$$
$$or`r=\sqrt[n]{a}$$

anonymous · Answer

so b and c?

anonymous · Answer

i don't think it is b
$$\because~n \sqrt{a}=n*a ^{\frac{ 1 }{2 }}~and~ \sqrt[n]{a} =a ^{\frac{ 1 }{ n }}$$

anonymous · Answer

yeah I don't understand what you just wrote

anonymous · Answer

if it is written outside sqrt just as$$n \sqrt{a}~then~\it~is~different~\to~\sqrt[n]{a }$$
$$n \sqrt{a}\neq \sqrt[n]{a}$$