Practice problem
Let f(x)=8x2f(x) = \sqrt{8x^2}f(x)=8x2. Which of these is equal to f(x)f(x)f(x) for all real xxx?
8x8x8x
4x4x4x
4∣x∣4|x|4∣x∣
(22)x(2\sqrt{2})x(22)x
(22)∣x∣(2\sqrt{2})|x|(22)∣x∣
Type a concept, like “slope” or “photosynthesis”.