(20⁰ - 18⁰) x 7⁰ is equal to:

1. 0

2. 1

3. 14

4. none of these

Given, (20⁰ - 18⁰) x 7⁰

As we know that a⁰ = 1

⇒ (1 - 1) x 1

⇒ 0 x 1

⇒ 0

Hence, option 1 is the correct option.