Mathematics for IGCSE & O level - Indices 2 (Section 2 - No. 42)
What is the value of ( ( rac{1}{3})^{-2} )?
( rac{1}{9})
( rac{1}{6})
6
9
คำอธิบาย
The negative exponent inverts the base and then squares it: (( rac{1}{3})^{-2} = ( rac{3}{1})^2 = 3^2 = 9).