chloedonyes chloedonyes
  • 24-08-2018
  • Mathematics
contestada

45 POINTS h(x) = 1/x+2 and k(x) = 3x - 4
h[k(x)] =

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mohammad60
mohammad60 mohammad60
  • 24-08-2018
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PGM1 PGM1
  • 24-08-2018

We are told that h(x) = 1 / (x+2) and k(x) = 3x - 4. We want to find h(k(x)), or (h o k)(x). We work INSIDE OUT.

h(k(x)) = h(3x - 4).

Now we take the function, 3x - 4, and apply what h(x) wants us to do.

Evaluating h(3x - 4) means that we put the 3x - 4 into h(x).

h(x) = 1 / (x+2)

So h(3x -4) = 1 / (3x -4) + 2 <---- notice how x was the same. so are the 3x -4 parts

= 1 / 3x - 2


Thus, the composition is [tex] \frac{1}{3x-2} [/tex]

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