Monosaccharides are the simplest carbohydrates and cannot be hydrolyzed further. Examples: Glucose Fructose Galactose In contrast: Polysaccharides (e.g., starch) and disaccharides (e.g., sucrose) can be hydrolyzed into smaller sugar units. Oligosaccharides consist of a few monosaccharide units.
Final Answer: \[ \boxed{\text{Monosaccharides}} \]
Given, the function \( f(x) = \frac{a^x + a^{-x}}{2} \) (\( a > 2 \)), then \( f(x+y) + f(x-y) \) is equal to