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984

Centuries: 9th century - 10th century - 11th century

Decades: 930s 940s 950s 960s 970s - 980s - 990s 1000s 1010s 1020s 1030s

Years: 979 980 981 982 983 - 984 - 985 986 987 988 989


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Composition of functions

... written f2. (f.f)(x)=f(f(x))=f2(x). Likewise, (f.f.f)(x)=f(f(f(x)))=f3(x). In some cases, an expression for f in g(x)=fr(x) can be derived from the rule for ...