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Mathematics for IGCSE & O level - Functions (Section 1 - No. 49)
What is f(g(x)) if f(x)=x-1 and g(x)=2x?
2x-1
2x+1
x-2
x/2-1
Forklaring
Substitute g(x) for x in f(x) resulting in f(2x)=2x-1
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