Problem
(b) \( -3 x^{8} \) (C) \( 81 x^{6} \) \( 81 x^{8} \) 5. Which expression is equivalent to \( x^{-6} x^{4} ? \) (a) \( \frac{1}{x^{2}} \) (b) \( \frac{1}{x^{24}} \) (C) \( \frac{1}{2 x^{2}} \) (3) \( \frac{1}{2 x^{24}} \)
Solution
Step 1 ：\( x^{-6} x^{4} = x^{-6+4} \)
Step 2 ：\( x^{-6} x^{4} = x^{-2} \)
Step 3 ：\( x^{-6} x^{4} = \frac{1}{x^{2}} \)
