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anonymous

  • 4 years ago

Why does 1/25 = 2^-5 ?

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  1. anonymous
    • 4 years ago
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    and can you explain this rule to me?

  2. anonymous
    • 4 years ago
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    because 2 is raised to a negative power.

  3. anonymous
    • 4 years ago
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    that doesn't really help ..

  4. anonymous
    • 4 years ago
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    thats one of the exponent rules. read your book or use google!

  5. anonymous
    • 4 years ago
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    a negative exponent is the reciprocal of the positive so x^-2 = 1/(x^2) = 1/5 and 5^-2 = 1/25

  6. anonymous
    • 4 years ago
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    ^-----This

  7. anonymous
    • 4 years ago
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    yea it a rule, learn it, live it, love it!

  8. anonymous
    • 4 years ago
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    thank you very much

  9. anonymous
    • 4 years ago
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    You will see it again when learning derivatives!

  10. anonymous
    • 4 years ago
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    just try to have fun with it!

  11. anonymous
    • 4 years ago
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    i can't. math is the death of me :(

  12. anonymous
    • 4 years ago
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    no, it just patterns and rules. Like a language.

  13. anonymous
    • 4 years ago
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    wait! wouldn't it equal 5^ -2?

  14. anonymous
    • 4 years ago
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    5^ -2 = 1/5^2 = 1/25

  15. anonymous
    • 4 years ago
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    is that a yes..

  16. anonymous
    • 4 years ago
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    yes

  17. anonymous
    • 4 years ago
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    so if the rule was 1/a^m = a^ -m......a and m can switch basically?

  18. anonymous
    • 4 years ago
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    let me be clear x^-b = 1/(x^b), yes?

  19. anonymous
    • 4 years ago
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    so like 1/25 = 1/5^2 = 5^-2 WHICH IS ALSO 2^ -5 so the "a" and "m" switched

  20. anonymous
    • 4 years ago
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    yes...

  21. anonymous
    • 4 years ago
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    but am i right...what i said?

  22. anonymous
    • 4 years ago
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    clear now? Thats the rule, among many :)

  23. anonymous
    • 4 years ago
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    please respond to what i said before...

  24. anonymous
    • 4 years ago
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    about a and m switching ?? lemme look at it.

  25. anonymous
    • 4 years ago
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    can the two values switch like that....like 5^ -2 = 2^ -5

  26. anonymous
    • 4 years ago
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    am i right to say that

  27. anonymous
    • 4 years ago
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    wait what?

  28. anonymous
    • 4 years ago
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    "1/25 = 1/5^2 = 5^-2 WHICH IS ALSO 2^ -5 " this is not true 2^-5 = 1/( 2^5) = 1/32- I misstyped.

  29. anonymous
    • 4 years ago
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    okay. do u mind giving me a few of these to practice...like quizzing me i guess lol

  30. anonymous
    • 4 years ago
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    sure 3^-3

  31. anonymous
    • 4 years ago
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    ummm oh god

  32. anonymous
    • 4 years ago
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    lets see..

  33. anonymous
    • 4 years ago
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    1/3^3

  34. anonymous
    • 4 years ago
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    ugh im wrong

  35. anonymous
    • 4 years ago
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    so far so good- and what is 1/(3^3)?

  36. anonymous
    • 4 years ago
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    that would be 3^-3

  37. anonymous
    • 4 years ago
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    yes, thats true too but what is 3^3?

  38. anonymous
    • 4 years ago
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    27

  39. anonymous
    • 4 years ago
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    so 1/(3^3) = 1/27 right?

  40. anonymous
    • 4 years ago
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    can u give me one where a and m are different numbers

  41. anonymous
    • 4 years ago
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    2^-3

  42. anonymous
    • 4 years ago
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    okay so this would be 1/2^3

  43. anonymous
    • 4 years ago
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    so 1/8

  44. anonymous
    • 4 years ago
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    :-)

  45. anonymous
    • 4 years ago
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    yes! so you seem to understand.

  46. anonymous
    • 4 years ago
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    can u do one with very big numbers? well like somewhere in the 200s-300s?

  47. anonymous
    • 4 years ago
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    sure 222^-300

  48. anonymous
    • 4 years ago
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    uh oh.... umm lemme think

  49. anonymous
    • 4 years ago
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    1/222^300

  50. anonymous
    • 4 years ago
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    okay i think i got this now ! just gotta memorize that rule! :D

  51. anonymous
    • 4 years ago
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    are you gonna be online bc i might have more questions :)

  52. anonymous
    • 4 years ago
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    you might want a calculator at this point, The rule x^-n = 1/(x^n) is true for ALL number

  53. anonymous
    • 4 years ago
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    I will be around until Im not :)

  54. anonymous
    • 4 years ago
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    we are not allowed to use calculators on our quiz :(

  55. anonymous
    • 4 years ago
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    yea so 222^-300 might not be on the quiz :P btw the answer is : 1/80517880668393229147886068496149401306972582290411328168978510994785579115588583551827976204875447471474879862267202705113127441091878902354853813041890222152198455342144439084242078428238138714265508683035791505554760104867426467157715278054403172295031898472730484002817659144331717312161700756934610875579137993642195693033512692240606656314618045823043091894260503678798685779973005364739112564184555335918720320643432850355542239025011335644126445607944039212224942030284232383674702362906793619267527992062005620717473752544451951685766644998888627609736993334783701457851056538472011058453524224265800042617872532780902329250444294802910839828000675334422137717517355426310014485465179583860965376

  56. anonymous
    • 4 years ago
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    study hard.

  57. anonymous
    • 4 years ago
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    oh my goodness. are you like a math teacher or something. you are so good at this stuff

  58. anonymous
    • 4 years ago
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    no, Im a student, like you.

  59. anonymous
    • 4 years ago
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    lol i am a junior in high school and i still do not understand this stuff

  60. anonymous
    • 4 years ago
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    practice, practice, practice.

  61. anonymous
    • 4 years ago
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    ugh. i hate math so much. do you know much about logs

  62. anonymous
    • 4 years ago
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    some what is the deal?

  63. anonymous
    • 4 years ago
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    hold on give me a minute

  64. anonymous
    • 4 years ago
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    you should open another question- there a lot of smart people here.

  65. anonymous
    • 4 years ago
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    okay i will. thank you for all your help! hope to talk to you more sometime on the webbiste! :) - Olivia

  66. anonymous
    • 4 years ago
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    sure, I will keep an eye out for your questions :)

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