Final answer:
To rewrite expressions without a negative exponent, we rewrite 1/x as x^-1.
Step-by-step explanation:
The question asks for each expression to be rewritten without a negative exponent. So, let's go through each expression:
a) For x, there is no negative exponent, so it does not need to be rewritten.
b) For x, again there is no negative exponent, so no rewriting is needed.
c) For 1/x, we can rewrite it as x^-1 to remove the negative exponent.
d) For 1/x, we can also rewrite it as x^-1 to eliminate the negative exponent.
Therefore, the expressions after rewriting without negative exponents are:
a) x
b) x
c) x^-1
d) x^-1