I need help, please, understanding this question.

When rewriting an exponential expression with a negative exponent and a positive base to an expression containing only a positive exponent, does the sign of the base change? Demonstrate with an example.

Question

I need help, please, understanding this question.

When rewriting an exponential expression with a negative exponent and a positive base to an expression containing only a positive exponent, does the sign of the base change? Demonstrate with an example.

anonymous · Answer

no it doesn't.... tak this for example:  
$$\huge y=2^{-x} $$
you can actually rewrite this in the following way:
$$\large y=2^{-x}=(2^{-1})^x=(\frac{1}{2})^x $$