What is the value of f[g (5) ] for the functions f (x) = 2x + 1 and g (x) = 2x - 5?

Question

Madilynn Maxwell

Mathematics

12 November, 09:56

What is the value of f[g (5) ] for the functions f (x) = 2x + 1 and g (x) = 2x - 5?

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Kristina Armstrong · Answer 1

The function f (x) is f (x) = 2x+1 The value of f[g (5) ] can be obtained if any unknown x in the equation f (x) we replace with g (5). But what is g (5) ? We can obtain the value for g (5) if we replace the variable x in g (x) with 5. g (5) = 2*5-5=10-5=5 So, f[g (5) ] = f (5), f (5) = 2*5+1=10+1=11.