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anonymous

  • one year ago

What is the least common denominator of the fraction 3 x over x plus 1 plus the fraction x plus 1 over 2 x plus the fraction 5 over x?

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  1. anonymous
    • one year ago
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    |dw:1437173731559:dw|

  2. anonymous
    • one year ago
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    The least common denominator is 2x(x+1).

  3. anonymous
    • one year ago
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    not 2(x^2+1)

  4. anonymous
    • one year ago
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    @jim_thompson5910

  5. jim_thompson5910
    • one year ago
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    |dw:1437174478470:dw|

  6. jim_thompson5910
    • one year ago
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    we have x+1, 2x and x

  7. jim_thompson5910
    • one year ago
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    the LCD is equal to the LCM of x+1, 2x and x

  8. jim_thompson5910
    • one year ago
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    if we look at the unique factors of the three expressions, we will find that x+1, 2 and x are the unique factors (x repeats itself twice) so that's why the LCM of x+1, 2x and x is `2x(x+1)` so the LCD is also `2x(x+1)`

  9. anonymous
    • one year ago
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    oK! Thank you!

  10. anonymous
    • one year ago
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    What are the discontinuities of the function f(x) = the quantity x squared minus 16 over the quantity 4x plus 24?

  11. anonymous
    • one year ago
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    I got -6

  12. jim_thompson5910
    • one year ago
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    very nice 4x+24 = 0 leads to x = -6

  13. anonymous
    • one year ago
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    Last one:)

  14. anonymous
    • one year ago
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    After the fraction x plus 1 all over 2 minus the fraction x plus 2 all over 3 x have been combined using the least common denominator of 6x, what is the numerator?

  15. anonymous
    • one year ago
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    I got 3x^2+x-4 :)

  16. anonymous
    • one year ago
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    |dw:1437174637242:dw|

  17. jim_thompson5910
    • one year ago
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    very good. I'm getting the same

  18. anonymous
    • one year ago
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    Yay!!

  19. anonymous
    • one year ago
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    What is the graph of the function f(x) = the quantity negative x squared plus x plus 20 over the quantity x plus 4?

  20. anonymous
    • one year ago
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    I don't understand this one? I got x=-4 for the discontinuity and -9 as the point.

  21. jim_thompson5910
    • one year ago
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    you can use desmos to graph if you don't have a graphing calculator https://www.desmos.com/calculator

  22. jim_thompson5910
    • one year ago
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    you would type in (-x^2 + x + 20)/(x+4) don't forget the parenthesis

  23. anonymous
    • one year ago
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    okay thanks for all your help:)!!!!!

  24. jim_thompson5910
    • one year ago
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    you're welcome

  25. anonymous
    • one year ago
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    lol i gave you the right answer...

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