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mafiozo [28]
3 years ago
4

The function h (x) = StartFraction 2 (x + 3) Over x EndFraction is a result of the composition (g compose f) (x). If g (x) = Sta

rtFraction 2 over x EndFraction, what is f(x)?
Mathematics
2 answers:
professor190 [17]3 years ago
8 0

Answer:

f(x) = \frac{2x}{2x + 3}

Step-by-step explanation:

Given

h(x) = \frac{2x + 3}{x}

g(x) = \frac{2}{x}

g(f(x)) = h(x)

Required

Find f(x)

g(x) = \frac{2}{x}

Substitute x for f(x)

g(f(x)) = \frac{2}{f(x)}

Recall that

g(f(x)) = h(x)

This gives

\frac{2}{f(x)} = \frac{2x + 3}{x}

Cross Multiply

f(x) * (2x + 3) = 2 * x

f(x) * (2x + 3) = 2 x

Make f(x) the subject of formula

f(x) = \frac{2x}{2x + 3}

Helen [10]3 years ago
3 0

Answer:

x/x+3

Step-by-step explanation:

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