Question

i think the answer is c but not sure...

Answer 1

@dhiraj123

Answer 2

@zepdrix

Answer 3

If you were `adding` them, then yes you would end up with a quantity of 4 of the "things" like in option A.

But here we're multiplying four of the same thing.\[\Large\rm \sqrt[7]{x}\cdot\sqrt[7]{x}\cdot\sqrt[7]{x}\cdot\sqrt[7]{x}=\qquad (\sqrt[7]{x})^4\]

Answer 4

Is there another way we could write that? :)
Recall that we can include `roots` in the exponent if we place it in the denominator.