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Torrayani<3

  • 3 years ago

4. If f(x) = 4x + 1 and g(x) = −x − 2, find (f + g)(−1).

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  1. zaynahf
    • 3 years ago
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    What (f+g)(-1) means is to add up the two binomials first f(x)+g(x), and then substitute -1 for x. What do you get when you do: 4x+1-x-2

  2. Torrayani<3
    • 3 years ago
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    5x=3???

  3. zaynahf
    • 3 years ago
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    There's no = sign, just simplify it by adding like terms: First do 4x-x, and then 1-2

  4. Torrayani<3
    • 3 years ago
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    3x -1?

  5. Torrayani<3
    • 3 years ago
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    @zaynahf

  6. zaynahf
    • 3 years ago
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    Good.. now just substitute -1 for x

  7. Torrayani<3
    • 3 years ago
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    so it's going to be -1x or -3x

  8. zaynahf
    • 3 years ago
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    No, because you are substituting something for x, there will be no more x. Do this: 3(-1)-1

  9. Torrayani<3
    • 3 years ago
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    -4!!

  10. zaynahf
    • 3 years ago
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    Yep! You got it!

  11. Torrayani<3
    • 3 years ago
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    thank you please come to my next post!

  12. zaynahf
    • 3 years ago
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    Sure..

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