Mathematical exponent one rules

One rules I

b¹ = b

For example,

9¹ = 1

One rules II

1ⁿ = 1

For example,

1⁶ = 1

Mathematical exponent Zero rules

Zero rules I

b⁰ = 1

For example,

9⁰ = 1

Zero rules II

0ⁿ = 0, for n>0

For example,

0⁶ = 0