Simplifying Expressions with Exponents

What is the simplified form of a⁻¹?

• a

• 1/a

• -a

• 1

How is the expression x⁻¹ + y⁻¹ rewritten using positive exponents?

• 1/(x+y)

• x+y

• 1/x + 1/y

• xy

How is the expression (xy)⁻¹ rewritten using positive exponents?

• 1/(x+y)

• 1/(xy)

• xy

• x/y

When simplifying 1/x + 1/y, what is the common denominator?

• x+y

• 1

• xy

• x/y

What is the simplified form of the expression (x⁻¹ + y⁻¹) / (xy)⁻¹?

• 1/(x+y)

• xy

• x+y

• 1