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iwanttogotostanford

  • one year ago

HELP WITH ACT PRACTICE QUESTION: if f(x)=x^2+x+5 and g(x) = sqrroot x, then what is the value of g(4)/f(1) ?

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  1. freckles
    • one year ago
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    enter 1 into the expression named f enter 4 into the expression named g

  2. iwanttogotostanford
    • one year ago
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    why?? I'm doing a practice test and i got this one wrong so i don't need the answer as much just how to do the problem!:-)

  3. dinamix
    • one year ago
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    2/7

  4. iwanttogotostanford
    • one year ago
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    @dinamix @freckles can you explain why?

  5. freckles
    • one year ago
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    have you entered 1 into the expression named f yet?

  6. iwanttogotostanford
    • one year ago
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    @freckles yes

  7. freckles
    • one year ago
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    f(x)=x^2+x+5 replace x with 1 g(x)=sqrt(x) replace x with 4

  8. freckles
    • one year ago
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    what do you get when you evaluate x^2+x+5 for x=1 and what do you get when you evaluate sqrt(x) for x=4?

  9. iwanttogotostanford
    • one year ago
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    7 and 2

  10. freckles
    • one year ago
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    correct \[\frac{g(4)}{f(1)}=\frac{\sqrt{4}}{1^2+1+5}=\frac{2}{7}\]

  11. dinamix
    • one year ago
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    that correct @iwanttogotostanford

  12. iwanttogotostanford
    • one year ago
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    ok thanks that wasn't so hard I guess

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