Subject: Mathematics
Book: Maths Mastery
Function composition f(g(x)) means applying g first, then feeding that result into f. For instance, if f(x)=x²+1 and g(x)=2x–3, then f(g(x))= (2x–3)²+1=4x²–12x+9+1=4x²–12x+10. Composition frequently appears in advanced algebra, transformations, and chain-rule usage in calculus. In real-world models, you might first calculate a cost function g(x), then apply a tax function f to g(x). Mastery of composition fosters advanced manipulations of nested processes and underpins functional decomposition strategies in computing, engineering, or multi-stage transformations.
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