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katlin95 Group Title

f(x)=sqrt2x-5 find f (7) A. 2 B. 3 C. -5 D. 7

  • one year ago
  • one year ago

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  1. Azteck Group Title
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    When they ask you to find f(7) and the equation is \[\large f(x)=\sqrt{2x-5}\] f(7) is the form of f(x), so what would the 7 be replacing in f(x)?

    • one year ago
  2. Azteck Group Title
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    @katlin95

    • one year ago
  3. katlin95 Group Title
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    oh so 7 would be our answer right?

    • one year ago
  4. Azteck Group Title
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    No...I'm asking you aquestion unrelated to the answer. In maths, I never just go finding the answer in 2 seconds. You need stepping blocks before you can get to the answer...

    • one year ago
  5. Azteck Group Title
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    a question*

    • one year ago
  6. katlin95 Group Title
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    yep the 7 would be replacingit

    • one year ago
  7. Azteck Group Title
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    What's "it"?

    • one year ago
  8. Azteck Group Title
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    Is the 7 replacing the moon or something. You're not being specific.

    • one year ago
  9. katlin95 Group Title
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    f(x)

    • one year ago
  10. Azteck Group Title
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    f(x) and f(7)...what's the difference between those two figures. I'm just asking you to look at it as a picture and you're trying to spot the difference. what's different. Is the letter f different to each other, are the brackets different? What's different between f(x) and f(7)?

    • one year ago
  11. Azteck Group Title
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    That's a very straight forward question for children under 7. You should be able to get this in a flash.

    • one year ago
  12. katlin95 Group Title
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    7 replaces x

    • one year ago
  13. Azteck Group Title
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    Excellent.

    • one year ago
  14. Azteck Group Title
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    So \[\large f(7)=\sqrt{2(7)-5}\]

    • one year ago
  15. Azteck Group Title
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    That's in the form of this \[\large f(x)=\sqrt{2x-5}\] Correct?

    • one year ago
  16. katlin95 Group Title
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    yep

    • one year ago
  17. Azteck Group Title
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    Everytime you see the term x, you sub in 7. So now could you just calculate the number that's inside the sqrt sign for me?

    • one year ago
  18. katlin95 Group Title
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    i got 2x-5 still

    • one year ago
  19. Azteck Group Title
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    We're using this... -_-... \[\huge f(7)=\sqrt{2(7)-5}\] Does the question say find f(x)...Because if says that, then it's like child's play. You would just be rewriting what the question gave you...You must pay attention to detail and everything that's related to the QUESTION. The QUESTION in every single subject is like the holy bible in religious terms. The question is the key to everything you do to work out the answer.

    • one year ago
  20. katlin95 Group Title
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    3

    • one year ago
  21. Azteck Group Title
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    Correct. Good job. Remember that important basic: read the question. People make mistakes because they're too lazy to read the question. It's that simple. People smart enough to just focus on the question and what it's asking you to do, would obviously be the one's getting top marks.

    • one year ago
  22. katlin95 Group Title
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    yay!

    • one year ago
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