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Ira Lisetskai [31]
3 years ago
14

If g(x)=x+1/x-2 and h(x) = 4 – x, what is the value of (gxh) (-3)

Mathematics
1 answer:
suter [353]3 years ago
3 0

For this case we have the following functions:

g (x) = \frac {x + 1} {x-2}\\h (x) = 4-x

We must find (g * h) (x)

By definition we have to:

(g * h) (x) = g (x) * h (x)

So:

(g * h) (x) = \frac {(x + 1) (4-x)} {x-2}

Now, we evaluate the function at x = -3:

(g * h) (- 3) = \frac {(- 3 + 1) (4 - (- 3))} {- 3-2}\\(g * h) (- 3) = \frac {(- 2) (4 + 3)} {- 5}\\(g * h) (- 3) = \frac {(- 2) (7)} {- 5}\\(g * h) (- 3) = \frac {-14} {- 5}\\(g * h) (- 3) = \frac {14} {5}

Answer:

(g * h) (- 3) = \frac {14} {5}

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