help with this math problem!?

5/√x = 5x^(-1/2)

Since there is no C among the choices, your deduction must be correct, but I would not expect any partial credit for that effort.

The expression which is equivalent to 5/√x:

Answer choice:

A) 5x^(-1/2) 

See explanation below.

Here is a clue

the answer is the first one.

5 / √x   =  5 x^(-1/2)

x^(½) = √x

1/(√x) = x^(-½)

So

5/(√x) = ?

You should be able to finish it off now.

Here's the "clue"

1/x^a = x^(-a)

Hint: Use a value: let x = 25. Conclusions?

the first.

1/√x = x^(–1/2)