Mathematics for IGCSE & O level - Indices 2 (Section 2 - No. 40)
Which of the following is true about ( a^{-n} )?
It is equivalent to (a^n)
It is equivalent to \(\frac{1}{a^n}\)
It is always negative.
It is always greater than 1.
설명
A negative exponent means the reciprocal of the base raised to the positive exponent: \(a^{-n} = \frac{1}{a^n}\).