Indices 2

Negative powers

• A(-n) = 1/A(n)
• A negative power can still have a positive answer

Reciprocals

• A(-1) = 1/a
• This means that a(-1) is the reciprocals of a
• You can find the reciprocal of a fraction by turning it upside down

Powers of fractions

• (a/b)n = a(n) / b(n)

Combining rules

• You can apply the rules one at a time
• (a/b)-n = (b/a)n = b(n) / a(n)

Fractional powers

• You can use fractional powers to represent roots
• A(1/2)=/a
• A(1/3)=3/a