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bakonloverk

  • 2 years ago

what is the multiplicative inverse?

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  1. tomo
    • 2 years ago
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    http://www.youtube.com/watch?v=-eUfNBD4Kwc

  2. Geometrythebest
    • 2 years ago
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    are you asking for the definition?

  3. Bri_Love
    • 2 years ago
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    multiplicative inverse (mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the multiplicative inverse of 7 is 1/7.

  4. bakonloverk
    • 2 years ago
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    ok wait wht is the multiplicative inverse of 5/7?

  5. Geometrythebest
    • 2 years ago
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    the inverse of a number means that if you multiply the number by its inverse you will get 1. so therefore, to work out the inverse you do 1 divided by the number.

  6. Bri_Love
    • 2 years ago
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    7/5

  7. bakonloverk
    • 2 years ago
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    ohhhhhh ok thank u

  8. skullpatrol
    • 2 years ago
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    Do you understand now?

  9. bakonloverk
    • 2 years ago
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    yea i do

  10. bakonloverk
    • 2 years ago
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    wait so would the inverse of -2 3/4 be 4/11?

  11. skullpatrol
    • 2 years ago
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    |dw:1360271797991:dw|

  12. skullpatrol
    • 2 years ago
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    |dw:1360271859211:dw|

  13. bakonloverk
    • 2 years ago
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    wait im confused

  14. bakonloverk
    • 2 years ago
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    wait wait wait never mind

  15. skullpatrol
    • 2 years ago
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    You are missing the minus sign.

  16. bakonloverk
    • 2 years ago
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    oh so its -4/11?

  17. skullpatrol
    • 2 years ago
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    Correct. What is the multiplicative inverse of -1?

  18. bakonloverk
    • 2 years ago
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    1/-1 right?

  19. skullpatrol
    • 2 years ago
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    What does that equal?

  20. bakonloverk
    • 2 years ago
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    -1

  21. skullpatrol
    • 2 years ago
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    Correct, excellent. how about the multiplicative inverse of 0?

  22. bakonloverk
    • 2 years ago
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    wouldnt tht just b 0?

  23. skullpatrol
    • 2 years ago
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    Are you sure? Think about it....

  24. bakonloverk
    • 2 years ago
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    wait 1?

  25. skullpatrol
    • 2 years ago
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    Please don't guess. Try to come up with a reasonable answer.

  26. bakonloverk
    • 2 years ago
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    well im not trying 2 guess

  27. skullpatrol
    • 2 years ago
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    I know, I know.... sorry but this is one of THE most difficult questions to understand for most students, I apologize.

  28. bakonloverk
    • 2 years ago
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    wait it is 0

  29. skullpatrol
    • 2 years ago
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    A multiplicative inverse is also called a "reciprocal" as is DEFINED as so, reciprocals: Two numbers whose product is 1.

  30. bakonloverk
    • 2 years ago
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    0/1 would b 1/0

  31. skullpatrol
    • 2 years ago
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    |dw:1360273959086:dw|

  32. bakonloverk
    • 2 years ago
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    ohhhh so the answer is 1?

  33. skullpatrol
    • 2 years ago
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    No.

  34. bakonloverk
    • 2 years ago
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    ugh then wht is it?

  35. skullpatrol
    • 2 years ago
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    The answer is "there is no answer"

  36. bakonloverk
    • 2 years ago
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    omg thts wht my calculator said

  37. skullpatrol
    • 2 years ago
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    Let me show you the DEFINING equation for reciprocals again: $$a*b=1$$ When asked to find the reciprocal of a number replace one of the letters in this equation with that number and solve for the other letter, for example: what is the reciprocal of 2? So $$2*b=1$$ What number multiplied by 2 gives 1?

  38. bakonloverk
    • 2 years ago
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    0.5

  39. skullpatrol
    • 2 years ago
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    Correct.

  40. bakonloverk
    • 2 years ago
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    YAY!!!! i finally understand something

  41. skullpatrol
    • 2 years ago
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    What is the reciprocal of 0.5?

  42. bakonloverk
    • 2 years ago
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    1/0.5?

  43. skullpatrol
    • 2 years ago
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    Yes!!! simplify that please. What number multiplied by 0.5 equals 1?

  44. bakonloverk
    • 2 years ago
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    2

  45. skullpatrol
    • 2 years ago
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    Correct.

  46. bakonloverk
    • 2 years ago
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    kk give me another one

  47. skullpatrol
    • 2 years ago
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    What is the reciprocal of 0?

  48. bakonloverk
    • 2 years ago
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    wait we just did this one

  49. skullpatrol
    • 2 years ago
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    Follow the steps I gave you above.

  50. bakonloverk
    • 2 years ago
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    0 * b = 1

  51. skullpatrol
    • 2 years ago
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    EXCELLENT!!! Now you are really learning :-D

  52. bakonloverk
    • 2 years ago
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    lol so then it would b 1/0?

  53. skullpatrol
    • 2 years ago
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    $$\frac{1}{0}$$ is not a number, because division by 0 is undefined.

  54. bakonloverk
    • 2 years ago
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    well yea but if we were using different numbers would it look almost like tht?

  55. skullpatrol
    • 2 years ago
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    Give me an example please.

  56. bakonloverk
    • 2 years ago
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    like in the problem im doing now hold on

  57. bakonloverk
    • 2 years ago
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    \[4\frac{ 1 }{ 8} would be \frac{ 8 }{ 33 } \]

  58. bakonloverk
    • 2 years ago
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    right?

  59. skullpatrol
    • 2 years ago
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    Yes.

  60. bakonloverk
    • 2 years ago
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    YAY!!!!

  61. skullpatrol
    • 2 years ago
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    Let me try and explain why you can never divide by 0. Dividing by 0 would mean multiplying by the reciprocal of 0, but 0 has no reciprocal because 0 times ANY number is 0, NOT 1.

  62. bakonloverk
    • 2 years ago
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    OMG tht makes soooo much sense now

  63. skullpatrol
    • 2 years ago
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    |dw:1360276164935:dw|

  64. bakonloverk
    • 2 years ago
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    nope

  65. skullpatrol
    • 2 years ago
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    So what is the answer to "what is the multiplicative inverse of 0?"

  66. skullpatrol
    • 2 years ago
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    |dw:1360276813364:dw|

  67. bakonloverk
    • 2 years ago
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    there is no answer u cant put any number there

  68. skullpatrol
    • 2 years ago
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    Correct.

  69. bakonloverk
    • 2 years ago
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    yay omg thank u so much

  70. skullpatrol
    • 2 years ago
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    np :)

  71. bakonloverk
    • 2 years ago
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    :)

  72. bakonloverk
    • 2 years ago
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    wait can u help me with another problem?

  73. bakonloverk
    • 2 years ago
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    the smallest owl found in the united states is the elf owl, which weighs 1 1/2 ounces. one of the largest owls is the Eurasian eagle owl which weighs nearly 10 pounds or 156 ounces. the Eurasian eagle owl is how many times as heavy as the elf owl?

  74. bakonloverk
    • 2 years ago
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    thts the problem^^^

  75. skullpatrol
    • 2 years ago
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    Any ideas?

  76. bakonloverk
    • 2 years ago
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    well idk how 2 set the problem up

  77. skullpatrol
    • 2 years ago
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    Decide what unknown number is asked for and what facts are known.

  78. bakonloverk
    • 2 years ago
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    do i have 2 convert 1 1/2 into an improper fraction?

  79. skullpatrol
    • 2 years ago
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    Yes.

  80. bakonloverk
    • 2 years ago
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    ok so thts 3/2

  81. skullpatrol
    • 2 years ago
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    Correct.

  82. bakonloverk
    • 2 years ago
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    then do i put 156 over 1?

  83. skullpatrol
    • 2 years ago
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    Yes.

  84. bakonloverk
    • 2 years ago
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    so would it b \[\frac{ 156 }{ 1 } - \frac{ 3 }{ 2 }\]

  85. skullpatrol
    • 2 years ago
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    |dw:1360277686583:dw|

  86. bakonloverk
    • 2 years ago
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    oh so its 156 divided by 3/2?

  87. skullpatrol
    • 2 years ago
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    Yes.

  88. bakonloverk
    • 2 years ago
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    so its 312/3

  89. bakonloverk
    • 2 years ago
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    so the answers 104 ounces?

  90. skullpatrol
    • 2 years ago
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    Not ounces, but how many times heavier.

  91. bakonloverk
    • 2 years ago
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    ohhhhh kk thank u

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